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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2014	Jul. 22, 2014	Dec. 31, 2013
Document and Entity Information
Entity Registrant Name	COMFORT SYSTEMS USA INC
Entity Central Index Key	0001035983
Document Type	10-Q
Document Period End Date	Jun. 30, 2014
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		37,748,396
Treasury Stock, Shares	3,374,969	3,374,969	3,488,438
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 49,759	$ 52,054
Accounts receivable, less allowance for doubtful accounts of $4,166 and $4,460, respectively	290,589	267,470
Other receivables	11,143	16,373
Inventories	9,084	8,430
Prepaid expenses and other	24,258	24,209
Costs and estimated earnings in excess of billings	38,352	28,122
Assets related to discontinued operations	311	339
Total current assets	423,496	396,997
PROPERTY AND EQUIPMENT, NET	52,086	46,861
GOODWILL	138,364	114,588
IDENTIFIABLE INTANGIBLE ASSETS, NET	48,319	37,383
OTHER NONCURRENT ASSETS	5,846	5,993
Total assets	668,111	601,822
CURRENT LIABILITIES:
Current maturities of notes to former owners		2,000
Current maturities of capital lease obligations	289
Accounts payable	108,359	100,825
Accrued compensation and benefits	41,993	44,093
Billings in excess of costs and estimated earnings	73,774	64,588
Accrued self-insurance expense	29,833	29,398
Other current liabilities	25,669	28,168
Liabilities related to discontinued operations	317	366
Total current liabilities	280,234	269,438
LONG-TERM DEBT	52,000
LONG-TERM CAPITAL LEASE OBLIGATIONS	614
DEFERRED INCOME TAX LIABILITIES	9,099	9,941
OTHER LONG-TERM LIABILITIES	9,395	8,421
Total liabilities	351,342	287,800
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY:
Preferred stock, $.01 par, 5,000,000 shares authorized, none issued and outstanding
Common stock, $.01 par, 102,969,912 shares authorized, 41,123,365 and 41,123,365 shares issued, respectively	411	411
Treasury stock, at cost, 3,374,969 and 3,488,438 shares, respectively	(36,569)	(37,468)
Additional paid-in capital	319,213	318,123
Retained earnings	15,402	14,768
Comfort Systems USA, Inc. stockholders' equity	298,457	295,834
Noncontrolling interests	18,312	18,188
Total stockholders' equity	316,769	314,022
Total liabilities and stockholders' equity	$ 668,111	$ 601,822

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2014	Dec. 31, 2013
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 4,166	$ 4,460
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	102,969,912	102,969,912
Common stock, shares issued	41,123,365	41,123,365
Treasury stock, shares	3,374,969	3,488,438

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS
REVENUE	$ 362,801	$ 351,053	$ 684,182	$ 676,943
COST OF SERVICES	300,942	291,086	570,174	565,509
Gross profit	61,859	59,967	114,008	111,434
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	50,573	45,699	100,958	92,219
GOODWILL IMPAIRMENT	727		727
GAIN ON SALE OF ASSETS	(89)	(111)	(222)	(250)
Operating income	10,648	14,379	12,545	19,465
OTHER INCOME (EXPENSE):
Interest income	2	7	13	14
Interest expense	(462)	(347)	(798)	(685)
Changes in the fair value of contingent earn-out obligations	(130)	(27)		(54)
Other	24	37	92	101
Other income (expense)	(566)	(330)	(693)	(624)
INCOME BEFORE INCOME TAXES	10,082	14,049	11,852	18,841
INCOME TAX EXPENSE	3,746	5,735	4,438	7,778
INCOME FROM CONTINUING OPERATIONS	6,336	8,314	7,414	11,063
Loss from discontinued operations, net of income tax benefit of $- , $- , $(10) and $(39)			(15)	(54)
NET INCOME INCLUDING NONCONTROLLING INTERESTS	6,336	8,314	7,399	11,009
Less: Net income attributable to noncontrolling interests	1,935	552	2,623	715
NET INCOME ATTRIBUTABLE TO COMFORT SYSTEMS USA, INC.	$ 4,401	$ 7,762	$ 4,776	$ 10,294
Basic-
Income from continuing operations (in dollars per share)	$ 0.12	$ 0.21	$ 0.13	$ 0.28
Net income (in dollars per share)	0.12	0.21	0.13	0.28
Diluted-
Income from continuing operations (in dollars per share)	0.12	0.21	0.13	0.28
Net income (in dollars per share)	$ 0.12	$ 0.21	$ 0.13	$ 0.28
SHARES USED IN COMPUTING INCOME PER SHARE:
Basic (in shares)	37,706	37,190	37,644	37,128
Diluted (in shares)	37,880	37,365	37,914	37,349
DIVIDENDS PER SHARE (in dollars per share)	$ 0.055	$ 0.05	$ 0.11	$ 0.10

CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS
Operating loss, income tax expense (benefit)	$ (10)	$ (39)

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Deficit)	Non-Controlling Interests
BALANCE at Dec. 31, 2012	$ 287,306	$ 411	$ (41,012)	$ 317,534	$ (6,528)	$ 16,901
BALANCE (in shares) at Dec. 31, 2012		41,123,365	(3,879,299)
Increase (Decrease) in Stockholders' Equity
Net income	28,556				27,269	1,287
Issuance of Stock:
Issuance of shares for options exercised including tax benefit	5,233		$ 4,711	522
Issuance of shares for options exercised including tax benefit (in shares)			439,762
Issuance of restricted stock			$ 1,301	(1,301)
Issuance of restricted stock (in shares)			122,375
Shares received in lieu of tax withholding payment on vested restricted stock	(631)		$ (631)
Shares received in lieu of tax withholding payment on vested restricted stock (in shares)			(45,266)
Tax benefit from vesting of restricted stock	184			184
Forfeiture of unvested restricted stock			$ (5)	5
Forfeiture of unvested restricted stock (in shares)			(469)
Stock-based compensation	3,041			3,041
Dividends	(7,835)			(1,862)	(5,973)
Share repurchase	(1,832)		$ (1,832)
Share repurchase (in shares)			(125,541)
BALANCE at Dec. 31, 2013	314,022	$ 411	$ (37,468)	318,123	14,768	18,188
BALANCE (in shares) at Dec. 31, 2013		41,123,365	(3,488,438)
Increase (Decrease) in Stockholders' Equity
Net income	7,399				4,776	2,623
Issuance of Stock:
Issuance of shares for options exercised including tax benefit	800		$ 692	108
Issuance of shares for options exercised including tax benefit (in shares)			64,119
Issuance of restricted stock			$ 1,243	(1,243)
Issuance of restricted stock (in shares)			115,044
Shares received in lieu of tax withholding payment on vested restricted stock	(531)		$ (531)
Shares received in lieu of tax withholding payment on vested restricted stock (in shares)			(34,657)
Tax benefit from vesting of restricted stock	131			131
Stock-based compensation	2,094			2,094
Dividends	(4,142)				(4,142)
Distribution to noncontrolling interest	2,499					(2,499)
Share repurchase	$ (505)		$ (505)
Share repurchase (in shares)	(100,000)		(31,037)
BALANCE at Jun. 30, 2014	$ 316,769	$ 411	$ (36,569)	$ 319,213	$ 15,402	$ 18,312
BALANCE (in shares) at Jun. 30, 2014		41,123,365	(3,374,969)

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
CASH FLOWS FROM OPERATING ACTIVITIES
Net income including noncontrolling interests	$ 6,336	$ 8,314	$ 7,399	$ 11,009
Adjustments to reconcile net income to net cash provided by (used in) operating activities-
Amortization of identifiable intangible assets	1,781	1,740	3,385	3,669
Depreciation expense	3,219	2,799	6,269	5,645
Goodwill impairment	727		727
Bad debt expense	202	(471)	235	(318)
Deferred tax expense (benefit)	(1)	1,598	(1,623)	476
Amortization of debt financing costs	65	58	130	115
Gain on sale of assets	(89)	(111)	(222)	(250)
Changes in the fair value of contingent earn-out obligations	130	27		54
Stock-based compensation expense	1,439	1,793	2,870	2,720
(Increase) decrease in-
Receivables, net	(7,805)	(18,928)	(475)	(30,920)
Inventories	135	(50)	(258)	(13)
Prepaid expenses and other current assets	827	(83)	1,651	111
Costs and estimated earnings in excess of billings	(3,816)	4,528	(8,259)	(3,110)
Other noncurrent assets	(84)	127	98	249
Increase (decrease) in-
Accounts payable and accrued liabilities	9,167	4,595	(2,002)	4,742
Billings in excess of costs and estimated earnings	10,054	799	3,873	2,269
Other long-term liabilities	98	(35)	(197)	(99)
Net cash provided by (used in) operating activities	22,385	6,700	13,601	(3,651)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(4,452)	(4,029)	(8,334)	(7,237)
Proceeds from sales of property and equipment	323	325	540	502
Proceeds from businesses sold				43
Cash paid for acquisitions, earn-outs and intangible assets, net of cash acquired	(47,359)		(51,359)
Net cash used in investing activities	(51,488)	(3,704)	(59,153)	(6,692)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings (payments) on revolving line of credit	45,000		52,000
Payments on other long-term debt	(2,000)	(2,000)	(2,000)	(2,000)
Debt financing costs		(552)		(552)
Payments of dividends to shareholders	(2,072)	(1,913)	(4,139)	(3,766)
Share repurchase program	(89)	(510)	(505)	(655)
Shares received in lieu of tax withholding	(531)	(622)	(531)	(622)
Excess tax benefit of stock-based compensation	119	243	105	243
Proceeds from exercise of options	284	269	826	284
Distributions to noncontrolling interests	(2,499)		(2,499)
Net cash provided by (used in) financing activities	38,212	(5,085)	43,257	(7,068)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	9,109	(2,089)	(2,295)	(17,411)
CASH AND CASH EQUIVALENTS, beginning of period	40,650	25,435	52,054	40,757
CASH AND CASH EQUIVALENTS, end of period	$ 49,759	$ 23,346	$ 49,759	$ 23,346

Business and Organization	6 Months Ended
Business and Organization	Jun. 30, 2014
Business and Organization
Business and Organization	1. Business and Organization Comfort Systems USA, Inc., a Delaware corporation, provides comprehensive heating, ventilation and air conditioning ("HVAC") installation, maintenance, repair and replacement services within the mechanical services industry. We operate primarily in the commercial, industrial and institutional HVAC markets and perform most of our services within office buildings, retail centers, apartment complexes, manufacturing plants and healthcare, education and government facilities. In addition to standard HVAC services, we provide specialized applications such as building automation control systems, fire protection, process cooling, electronic monitoring and process piping. Certain locations also perform related activities such as electrical service and plumbing. Approximately 45% of our consolidated 2014 revenue is attributable to installation of systems in newly constructed facilities, with the remaining 55% attributable to maintenance, repair and replacement services. The following service activities account for our consolidated 2014 revenue: HVAC 75%, plumbing 15%, building automation control systems 6% and other 4%. These service activities are within the mechanical services industry, which is the single industry segment we serve.

Summary of Significant Accounting Policies

6 Months Ended

Jun. 30, 2014

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

2. Summary of Significant Accounting Policies

Basis of Presentation

These interim statements should be read in conjunction with the historical Consolidated Financial Statements and related notes of Comfort Systems included in the Annual Report on Form 10-K as filed with the Securities and Exchange Commission ("SEC") for the year ended December 31, 2013 (the "Form 10-K").

The accompanying unaudited consolidated financial statements were prepared using generally accepted accounting principles for interim financial information and the instructions to Form 10-Q and applicable rules of Regulation S-X of the SEC. Accordingly, these financial statements do not include all the footnotes required by generally accepted accounting principles for complete financial statements and should be read in conjunction with the Form 10-K. We believe all adjustments necessary for a fair presentation of these interim statements have been included and are of a normal and recurring nature. The results of operations for interim periods are not necessarily indicative of the results for the full fiscal year.

Use of Estimates

The preparation of financial statements in conformity with generally accepted accounting principles requires the use of estimates and assumptions by management in determining the reported amounts of assets and liabilities, revenue and expenses and disclosures regarding contingent assets and liabilities. Actual results could differ from those estimates. The most significant estimates used in our financial statements affect revenue and cost recognition for construction contracts, the allowance for doubtful accounts, self-insurance accruals, deferred tax assets, warranty accruals, fair value accounting for acquisitions and the quantification of fair value for reporting units in connection with our goodwill impairment testing.

Cash Flow Information

We consider all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents.

Cash paid (in thousands) for:

	Three Months Ended June 30,				Six Months Ended June 30,

	2014		2013		2014		2013
Interest	$	623	$	509	$	884	$	520
Income taxes		405		2,525		924		3,123


Total	$	1,028	$	3,034	$	1,808	$	3,643

Income Taxes

We are subject to income tax in the United States and Puerto Rico and we file a consolidated return for federal income tax purposes. Income taxes are provided for under the liability method, which takes into account differences between financial statement treatment and tax treatment of certain transactions.

Deferred income taxes are based on the difference between the financial reporting and tax basis of assets and liabilities. The deferred income tax provision represents the change during the reporting period in the deferred tax assets and deferred tax liabilities, net of the effect of acquisitions and dispositions. Deferred tax assets include tax loss and credit carry-forwards and are reduced by a valuation allowance if, based on available evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized.

We regularly evaluate valuation allowances established for deferred tax assets for which future realization is uncertain. We perform this evaluation quarterly. In assessing the realizability of deferred tax assets, we must consider whether it is more likely than not that some portion, or all, of the deferred tax assets will not be realized. We consider all available evidence, both positive and negative, in determining whether a valuation allowance is required. Such evidence includes the scheduled reversal of deferred tax liabilities, projected future taxable income, taxable income in prior carryback years and tax planning strategies in making this assessment, and judgment is required in considering the relative weight of negative and positive evidence.

Significant judgment is required in assessing the timing and amounts of deductible and taxable items. We establish reserves when, despite our belief that our tax return positions are fully supportable, we believe that certain positions may be challenged and potentially disallowed. When facts and circumstances change, we adjust these reserves through our provision for income taxes.

To the extent interest and penalties may be assessed by taxing authorities on any underpayment of income tax, such amounts have been accrued and are classified as a component of income tax expense in our consolidated statements of operations.

For the six months ended June 30, 2014 our tax expense is $4.4 million with an effective tax rate of 37.4% as compared to tax expense of $7.8 million with an effective tax rate of 41.3% for the six months ended June 30, 2013. The effective rate for 2014 is higher than the federal statutory rate of 35.0% primarily due to state income taxes (4.0%) which were partially offset by the impact of the noncontrolling interest of EAS which for tax purposes is treated as a partnership (2.4%). The effective rate for 2013 is higher than the federal statutory rate of 35.0% primarily due to state income taxes (4.0%) and losses in a foreign jurisdiction subject to a lower tax rate (2.9%). Tax reserves are analyzed and adjusted quarterly as events occur to warrant such changes. Adjustments to tax reserves are a component of the effective tax rate.

Financial Instruments

Our financial instruments consist of cash and cash equivalents, accounts receivable, other receivables, accounts payable, notes to former owners and a revolving credit facility. We believe that the carrying values of these instruments on the accompanying balance sheets approximate their fair values.

Segment Disclosure

Our activities are within the mechanical services industry, which is the single industry segment we serve. Each operating subsidiary represents an operating segment and these segments have been aggregated, as the operating units meet all of the aggregation criteria.

Reclassifications

Certain reclassifications have been made in prior period financial statements to conform to current period presentation. These reclassifications are of a normal and recurring nature and have not resulted in any changes to previously reported net income for any periods.

Recent Accounting Pronouncements

In April 2014, the FASB issued ASU No. 2014-08, "Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU 2014-08 raises the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other disposals that do not meet the definition of a discontinued operation. It is effective for annual periods beginning on or after December 15, 2014. Early adoption is permitted but only for disposals that have not been reported in financial statements previously issued. We do not believe this pronouncement will have a material impact on our consolidated financial statements.

In May 2014, the FASB issued ASU No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." ASU 2014-09 provides a framework that replaces the existing revenue recognition guidance. It is effective for annual periods beginning after December 15, 2016, including interim periods within that reporting period. We are currently reviewing the effect of ASU No. 2014-09 on our revenue recognition.

Fair Value Measurements

6 Months Ended

Jun. 30, 2014

Fair Value Measurements

Fair Value Measurements

3. Fair Value Measurements

We classify and disclose assets and liabilities carried at fair value in one of the following three categories:

•

Level 1—quoted prices in active markets for identical assets and liabilities;

•

Level 2—observable market based inputs or unobservable inputs that are corroborated by market data; and

•

Level 3—significant unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.

The following table summarizes the fair values and levels within the fair value hierarchy in which the fair value measurements fall for assets and liabilities measured on a recurring basis as of June 30, 2014 (in thousands):

			Fair Value Measurements at Reporting Date Using

	Total		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents	$	49,759	$	49,759	$	—	$	—
Life insurance—cash surrender value	$	2,972	$	—	$	2,972	$	—
Contingent earn-out obligations	$	520	$	—	$	—	$	520

Cash and cash equivalents consist primarily of highly rated money market funds at a variety of well-known institutions with original maturities of three months or less. The original cost of these assets approximates fair value due to their short term maturity.

One of our operations has life insurance policies covering 41 employees with a combined face value of $38.9 million. The policy is invested in mutual funds and the fair value measurement is determined using level 2 inputs within the fair value hierarchy and will vary with investment performance. The cash surrender value of these policies is $3.0 million as of June 30, 2014 and $2.9 million as of December 31, 2013. These assets are included in "Other Noncurrent Assets" in our consolidated balance sheets.

The valuation of our contingent earn-out obligations is determined using a probability weighted discounted cash flow method. This fair value measurement is based on significant unobservable inputs in the market and thus represents a Level 3 measurement within the fair value hierarchy. This analysis reflects the contractual terms of the purchase agreements (e.g., minimum and maximum payments, length of earn-out periods, manner of calculating any amounts due, etc.) and utilizes assumptions with regard to future cash flows, probabilities of achieving such future cash flows and a discount rate. The contingent earn-out obligations are measured at fair value each reporting period and changes in estimates of fair value are recognized in earnings.

The table below presents a reconciliation of the fair value of our contingent earn-out obligations that use significant unobservable inputs (Level 3) (in thousands).


Balance at beginning of year	$	320
Issuances		200
Settlements		—
Adjustments to fair value		—


Balance at end of period	$	520

We measure certain assets at fair value on a nonrecurring basis. These assets are recognized at fair value when they are deemed to be other-than-temporarily impaired. During the quarter ended June 30, 2014, we recorded a goodwill impairment charge of $0.7 million based on Level 3 measurements. See Note 6 "Goodwill and Identifiable Intangible Assets, Net" for further discussion. We did not recognize any other impairments, in the current quarter, on those assets required to be measured at fair value on a nonrecurring basis.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Acquisitions	6 Months Ended
Acquisitions	Jun. 30, 2014
Acquisitions
Acquisitions	4. Acquisitions We completed two acquisitions in the second quarter of 2014, one of which was "tucked-in" with existing operations and the second reports as a separate operating location in northern Texas. The acquisition date fair value of consideration transferred for the operation in northern Texas was $40.2 million, of which $30.4 million was allocated to goodwill and identifiable intangible assets. We completed one acquisition in the first quarter of 2014 which was "tucked-in" with existing operations. No acquisitions were completed in 2013. The completed acquisitions were not material, individually or in the aggregate. Our consolidated balance sheet includes preliminary allocations of the purchase price to the assets acquired and liabilities assumed based on estimates of fair value, pending completion of final valuation and purchase price adjustments. The results of operations of acquisitions are included in our consolidated financial statements from their respective acquisition dates. Additional contingent purchase price ("earn-out") has been or will be paid if certain acquisitions achieve predetermined profitability targets.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

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-Name Accounting Standards Codification
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+ Details

Discontinued Operations

6 Months Ended

Jun. 30, 2014

Discontinued Operations

Discontinued Operations

5. Discontinued Operations

During the fourth quarter of 2012, we substantially completed the shutdown of our operation located in Delaware. Discontinued operations were breakeven for the three months ended June 30, 2014 and 2013, respectively. The after tax loss for the six months ended June 30, 2014 and 2013 was less than $0.1 million, respectively. These results have been recorded in discontinued operations under "Loss from discontinued operations, net of income tax benefit."

Our consolidated statements of operations and the related earnings per share amounts have been restated to reflect the effects of the discontinued operations. No interest expense is allocated to discontinued operations.

Revenue and pre-tax loss related to discontinued operations are as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,

	2014		2013		2014			2013
Revenue	$	12	$	49	$	12		$	22
Pre-tax loss	$	—	$	—	$	(25	)	$	(93	)

- Definition

The entire disclosure for the facts and circumstances leading to the completed or expected disposal, manner and timing of disposal, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the segment in which the disposal group was reported, and the classification (whether sold or classified as held for sale) and carrying value of the assets and liabilities comprising the disposal group. Includes all disposal groups, including those classified as components of the entity (discontinued operations).

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+ Details

Goodwill and Identifiable Intangible Assets, Net

6 Months Ended

Jun. 30, 2014

Goodwill and Identifiable Intangible Assets, Net

Goodwill and Identifiable Intangible Assets, Net

6. Goodwill and Identifiable Intangible Assets, Net

Goodwill

The changes in the carrying amount of goodwill are as follows (in thousands):

	June 30, 2014			December 31, 2013

Balance at beginning of year	$	114,588		$	114,588
Additions		24,503			—
Impairment adjustment		(727	)		—


Balance at end of period	$	138,364		$	114,588

We recorded a goodwill impairment charge of $0.7 million during the second quarter of 2014. Based on market activity declines and write-downs incurred on several jobs, we determined that the operating environment, conditions and performance at our operating location based in California could no longer support the related goodwill balance. When the carrying value of a given reporting unit exceeds its fair value, an impairment loss is recorded to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value. The fair value was estimated using a discounted cash flow model combined with market valuation approaches.

Identifiable Intangible Assets, Net

Identifiable intangible assets consist of the following (dollars in thousands):

		June 30, 2014					December 31, 2013

	Estimated Useful Lives in Years	Gross Book Value		Accumulated Amortization			Gross Book Value		Accumulated Amortization
Customer relationships	1 - 15	$	48,725	$	(23,520	)	$	40,404	$	(20,978	)
Backlog	1 - 2		1,600		(117	)		6,515		(6,515	)
Noncompete agreements	2 - 7		2,890		(2,758	)		2,890		(2,649	)
Tradenames	2 - 25		28,095		(6,596	)		23,695		(5,979	)


Total		$	81,310	$	(32,991	)	$	73,504	$	(36,121	)

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Long-Term Debt Obligations

6 Months Ended

Jun. 30, 2014

Long-Term Debt Obligations

Long-Term Debt Obligations

7. Long-Term Debt Obligations

Long-term debt obligations consist of the following (in thousands):

	June 30, 2014		December 31, 2013

Revolving credit facility	$	52,000	$	—
Notes to former owners		—		2,000


Total debt		52,000		2,000
Less—current portion		—		(2,000	)


Total long-term portion of debt	$	52,000	$	—

Revolving Credit Facility

On June 25, 2013, we amended our senior credit facility (the "Facility") provided by a syndicate of banks increasing our borrowing capacity from $125.0 million to $175.0 million. The Facility, which is available for borrowings and letters of credit, expires in July 2018 and is secured by a first lien on substantially all of our personal property except for assets related to projects subject to surety bonds and assets held by certain unrestricted subsidiaries and a second lien on our assets related to projects subject to surety bonds. As of June 30, 2014, we had $52.0 million of outstanding borrowings, $50.6 million in letters of credit outstanding and $72.4 million of credit available.

There are two interest rate options for borrowings under the Facility, the Base Rate Loan Option and the Eurodollar Rate Loan Option. These rates are floating rates determined by the broad financial markets, meaning they can and do move up and down from time to time. Additional margins are then added to these two rates.

The following is a summary of the additional margins:

	Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA

	Less than 0.75			0.75 to 1.50			1.50 to 2.25			2.25 or greater
Additional Per Annum Interest Margin Added Under:
Base Rate Loan Option		0.25	%		0.50	%		0.75	%		1.00	%
Eurodollar Rate Loan Option		1.25	%		1.50	%		1.75	%		2.00	%

The weighted average interest rate applicable to the borrowings under the Facility was approximately 3.50% as of June 30, 2014.

We have used letters of credit to guarantee performance under our contracts and to ensure payment to our subcontractors and vendors under those contracts. Our lenders issue such letters of credit through the Facility for a fee. We have never had a claim made against a letter of credit that resulted in payments by a lender or by us and believe such claims are unlikely in the foreseeable future. The letter of credit fees range from 1.25% to 2.00% per annum, based on the ratio of Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA, as defined in the credit agreement.

Commitment fees are payable on the portion of the revolving loan capacity not in use for borrowings or letters of credit at any given time. These fees range from 0.20% to 0.35% per annum, based on the ratio of Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA, as defined in the credit agreement.

The Facility contains financial covenants defining various financial measures and the levels of these measures with which we must comply. Covenant compliance is assessed as of each quarter end.

The Facility's principal financial covenants include:

Leverage Ratio—The Facility requires that the ratio of our Consolidated Total Indebtedness to our Credit Facility Adjusted EBITDA not exceed 3.00 through December 31, 2014, 2.75 through December 31, 2015 and 2.50 through maturity. The leverage ratio as of June 30, 2014 was 0.77.

Fixed Charge Coverage Ratio—The Facility requires that the ratio of Credit Facility Adjusted EBITDA, less non-financed capital expenditures, tax provision, dividends and amounts used to repurchase stock to the sum of interest expense and scheduled principal payments of indebtedness be at least 2.00; provided that the calculation of the fixed charge coverage ratio excludes stock repurchases and the payment of dividends at any time that the Company's Net Leverage Ratio does not exceed 1.50. The Facility also allows the fixed charge coverage ratio not to be reduced for stock repurchases through June 30, 2015 in an aggregate amount not to exceed $25 million if at the time of and after giving effect to such repurchase the Company's Net Leverage Ratio was less than or equal to 1.50. Capital expenditures, tax provision, dividends and stock repurchase payments are defined under the Facility for purposes of this covenant to be amounts for the four quarters ending as of any given quarterly covenant compliance measurement date. The fixed charge coverage ratio as of June 30, 2014 was 24.84.

Other Restrictions—The Facility permits acquisitions of up to $20.0 million per transaction, provided that the aggregate purchase price of such an acquisition and of acquisitions in the same fiscal year does not exceed $50.0 million. However, these limitations only apply when the Company's Net Leverage Ratio is equal to or greater than 2.00.

While the Facility's financial covenants do not specifically govern capacity under the Facility, if our debt level under the Facility at a quarter-end covenant compliance measurement date were to cause us to violate the Facility's leverage ratio covenant, our borrowing capacity under the Facility and the favorable terms that we currently have could be negatively impacted by the lenders.

We are in compliance with all of our financial covenants as of June 30, 2014.

Notes to Former Owners

We issued subordinated notes to the former owners of acquired companies as part of the consideration used to acquire these companies. These notes bear interest, payable annually, at a weighted average interest rate of 3.3%. In June 2014, we paid the outstanding balance of $2.0 million.

Other Debt

Our majority owned subsidiary, EAS, had a revolving $2.5 million credit line that was available for temporary working capital needs and expired June 30, 2014. This line of credit was not renewed until July 29, 2014 and expires July 31, 2015. The terms and conditions under the renewed agreement are substantially consistent with the previously existing agreement.

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2014
Commitments and Contingencies
Commitments and Contingencies	8. Commitments and Contingencies *Claims and Lawsuits* We are subject to certain legal and regulatory claims, including lawsuits arising in the normal course of business. We maintain various insurance coverages to minimize financial risk associated with these claims. We have estimated and provided accruals for probable losses and related legal fees associated with certain litigation in the accompanying consolidated financial statements. While we cannot predict the outcome of these proceedings, in management's opinion and based on reports of counsel, any liability arising from these matters individually and in the aggregate will not have a material effect on our operating results, cash flows or financial condition, after giving effect to provisions already recorded. *Surety* Many customers, particularly in connection with new construction, require us to post performance and payment bonds issued by a financial institution known as a surety. If we fail to perform under the terms of a contract or to pay subcontractors and vendors who provided goods or services under a contract, the customer may demand that the surety make payments or provide services under the bond. We must reimburse the surety for any expenses or outlays it incurs. To date, we are not aware of any losses to our sureties in connection with bonds the sureties have posted on our behalf, and do not expect such losses to be incurred in the foreseeable future. Surety market conditions remain challenging as a result of significant losses incurred by many sureties in recent periods, both in the construction industry as well as in certain larger corporate bankruptcies. As a result, less bonding capacity is available in the market and terms have become more restrictive. Further, under standard terms in the surety market, sureties issue bonds on a project-by-project basis, and can decline to issue bonds at any time. Historically, approximately 25% to 35% of our business has required bonds. While we have strong surety relationships to support our bonding needs, current market conditions as well as changes in the sureties' assessment of our operating and financial risk could cause the sureties to decline to issue bonds for our work. If that were to occur, the alternatives include doing more business that does not require bonds, posting other forms of collateral for project performance such as letters of credit or cash, and seeking bonding capacity from other sureties. We would likely also encounter concerns from customers, suppliers and other market participants as to our creditworthiness. While we believe our general operating and financial characteristics, including a significant amount of cash on our balance sheet, would enable us to ultimately respond effectively to an interruption in the availability of bonding capacity, such an interruption would likely cause our revenue and profits to decline in the near term. *Self-Insurance* We are substantially self-insured for workers' compensation, employer's liability, auto liability, general liability and employee group health claims, in view of the relatively high per-incident deductibles we absorb under our insurance arrangements for these risks. Losses up to deductible amounts are estimated and accrued based upon known facts, historical trends and industry averages. Loss estimates associated with the larger and longer-developing risks, such as workers' compensation, auto liability and general liability, are reviewed by a third-party actuary quarterly.

Stockholders' Equity

6 Months Ended

Jun. 30, 2014

Stockholders' Equity

Stockholders' Equity

9. Stockholders' Equity

Earnings Per Share

Basic earnings per share ("EPS") is computed by dividing net income by the weighted average number of shares of common stock outstanding during the period. Diluted EPS is computed considering the dilutive effect of stock options, contingently issuable restricted stock and restricted stock units.

There were no anti-dilutive stock options for the six months ended June 30, 2014. There were approximately 0.2 million anti-dilutive stock options excluded from the calculation of diluted EPS for the three months ended June 30, 2014. There were approximately 0.3 million and 0.4 million of anti-dilutive stock options excluded from the calculation of diluted EPS for the three and six months ended June 30, 2013, respectively.

The following table reconciles the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share for each of the periods presented (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,

	2014			2013			2014			2013
Common shares outstanding, end of period(a)		37,748			37,257			37,748			37,257
Effect of using weighted average common shares outstanding		(42	)		(67	)		(104	)		(129	)


Shares used in computing earnings per share—basic		37,706			37,190			37,644			37,128
Effect of shares issuable under stock option plans based on the treasury stock method		144			121			165			107
Effect of contingently issuable restricted shares		30			54			105			114


Shares used in computing earnings per share—diluted		37,880			37,365			37,914			37,349

(a): Excludes 0.1 million shares of unvested contingently issuable restricted stock outstanding as of June 30, 2013.

Share Repurchase Program

On March 29, 2007, our Board of Directors (the "Board") approved a stock repurchase program to acquire up to 1.0 million shares of our outstanding common stock. Subsequently, the Board has from time to time approved extensions of the program to acquire additional shares. Since the inception of the repurchase program, the Board has approved 6.6 million shares to be repurchased.

The share repurchases will be made from time to time at our discretion in the open market or privately negotiated transactions as permitted by securities laws and other legal requirements, and subject to market conditions and other factors. The Board may modify, suspend, extend or terminate the program at any time. During the six months ended June 30, 2014, we repurchased less than 0.1 million shares for approximately $0.5 million at an average price of $16.29 per share. Since the inception of the program in 2007 and as of June 30, 2014, we have repurchased a cumulative total of 6.0 million shares at an average price of $11.03 per share.

- Definition

The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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+ Details

Subsequent Event	6 Months Ended
Subsequent Event	Jun. 30, 2014
Subsequent Event
Subsequent Event	10. Subsequent Event On July 22, 2014, we amended our senior credit facility (the "Facility") provided by a syndicate of banks increasing our borrowing capacity from $175.0 million to $250.0 million. The Facility, which is available for borrowings and letters of credit, expires in October 2019. The terms, covenants and conditions of the amended agreement are substantially consistent with the previously existing agreement.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2014

Summary of Significant Accounting Policies

Basis of Presentation

Basis of Presentation

Use of Estimates

Use of Estimates

Cash Flow Information

Cash Flow Information

We consider all highly liquid investments purchased with an original maturity of three months or less to be cash equivalents.

Cash paid (in thousands) for:

	Three Months Ended June 30,				Six Months Ended June 30,

	2014		2013		2014		2013
Interest	$	623	$	509	$	884	$	520
Income taxes		405		2,525		924		3,123


Total	$	1,028	$	3,034	$	1,808	$	3,643

Income Taxes

Income Taxes

Financial Instruments

Financial Instruments

Segment Disclosure

Segment Disclosure

Reclassifications

Reclassifications

Recent Accounting Pronouncements

Recent Accounting Pronouncements

- Definition

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

+ References + Details

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

+ References + Details

Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Summary of Significant Accounting Policies

Schedule of cash paid

Cash paid (in thousands) for:

	Three Months Ended June 30,				Six Months Ended June 30,

	2014		2013		2014		2013
Interest	$	623	$	509	$	884	$	520
Income taxes		405		2,525		924		3,123


Total	$	1,028	$	3,034	$	1,808	$	3,643

Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value Measurements

Summary of fair values and levels within the fair value hierarchy in which the fair value measurements fall for assets and liabilities measured on a recurring basis

			Fair Value Measurements at Reporting Date Using

	Total		Quoted Prices In Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash and cash equivalents	$	49,759	$	49,759	$	—	$	—
Life insurance—cash surrender value	$	2,972	$	—	$	2,972	$	—
Contingent earn-out obligations	$	520	$	—	$	—	$	520

Schedule of reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)

The table below presents a reconciliation of the fair value of our contingent earn-out obligations that use significant unobservable inputs (Level 3) (in thousands).


Balance at beginning of year	$	320
Issuances		200
Settlements		—
Adjustments to fair value		—


Balance at end of period	$	520

Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2014

Discontinued Operations

Schedule of revenue and pre-tax loss related to discontinued operations

Revenue and pre-tax loss related to discontinued operations are as follows (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,

	2014		2013		2014			2013
Revenue	$	12	$	49	$	12		$	22
Pre-tax loss	$	—	$	—	$	(25	)	$	(93	)

- Definition

Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal.

+ References + Details

Goodwill and Identifiable Intangible Assets, Net (Tables)

6 Months Ended

Jun. 30, 2014

Goodwill and Identifiable Intangible Assets, Net

Schedule of changes in the carrying amount of goodwill

The changes in the carrying amount of goodwill are as follows (in thousands):

	June 30, 2014			December 31, 2013

Balance at beginning of year	$	114,588		$	114,588
Additions		24,503			—
Impairment adjustment		(727	)		—


Balance at end of period	$	138,364		$	114,588

Schedule of components of identifiable intangible assets

Identifiable intangible assets consist of the following (dollars in thousands):

		June 30, 2014					December 31, 2013

	Estimated Useful Lives in Years	Gross Book Value		Accumulated Amortization			Gross Book Value		Accumulated Amortization
Customer relationships	1 - 15	$	48,725	$	(23,520	)	$	40,404	$	(20,978	)
Backlog	1 - 2		1,600		(117	)		6,515		(6,515	)
Noncompete agreements	2 - 7		2,890		(2,758	)		2,890		(2,649	)
Tradenames	2 - 25		28,095		(6,596	)		23,695		(5,979	)


Total		$	81,310	$	(32,991	)	$	73,504	$	(36,121	)

Long-Term Debt Obligations (Tables)

6 Months Ended

Jun. 30, 2014

Long-Term Debt Obligations

Schedule of components of long-term debt obligations

Long-term debt obligations consist of the following (in thousands):

	June 30, 2014		December 31, 2013

Revolving credit facility	$	52,000	$	—
Notes to former owners		—		2,000


Total debt		52,000		2,000
Less—current portion		—		(2,000	)


Total long-term portion of debt	$	52,000	$	—

Summary of additional margins

	Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA

	Less than 0.75			0.75 to 1.50			1.50 to 2.25			2.25 or greater
Additional Per Annum Interest Margin Added Under:
Base Rate Loan Option		0.25	%		0.50	%		0.75	%		1.00	%
Eurodollar Rate Loan Option		1.25	%		1.50	%		1.75	%		2.00	%

Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2014

Stockholders' Equity

Reconciliation of number of shares outstanding with the number of shares used in computing basic and diluted earnings per share

The following table reconciles the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share for each of the periods presented (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,

	2014			2013			2014			2013
Common shares outstanding, end of period(a)		37,748			37,257			37,748			37,257
Effect of using weighted average common shares outstanding		(42	)		(67	)		(104	)		(129	)


Shares used in computing earnings per share—basic		37,706			37,190			37,644			37,128
Effect of shares issuable under stock option plans based on the treasury stock method		144			121			165			107
Effect of contingently issuable restricted shares		30			54			105			114


Shares used in computing earnings per share—diluted		37,880			37,365			37,914			37,349

(a): Excludes 0.1 million shares of unvested contingently issuable restricted stock outstanding as of June 30, 2013.

Business and Organization (Details)	6 Months Ended
Business and Organization (Details)	Jun. 30, 2014
Installation of systems in newly constructed facilities
Business and Organization
Percentage of revenue attributable to services	45.00%
Maintenance, repair and replacement services
Business and Organization
Percentage of revenue attributable to services	55.00%
HVAC
Business and Organization
Percentage of revenue attributable to services	75.00%
Plumbing
Business and Organization
Percentage of revenue attributable to services	15.00%
Building automation control systems
Business and Organization
Percentage of revenue attributable to services	6.00%
Other
Business and Organization
Percentage of revenue attributable to services	4.00%

Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Cash paid for:
Interest	$ 623	$ 509	$ 884	$ 520
Income taxes	405	2,525	924	3,123
Total	1,028	3,034	1,808	3,643
Income Taxes
Tax expense	$ 3,746	$ 5,735	$ 4,438	$ 7,778
Effective tax rate (as a percent)			37.40%	41.30%
Federal statutory income taxes rate (as a percent)			35.00%	35.00%
State income taxes rate (as a percent)			4.00%	4.00%
Foreign income taxes rate (as a percent)				2.90%
Noncontrolling interest (as a percent)			2.40%

Fair Value Measurements (Details) $ in Thousands	3 Months Ended	6 Months Ended
Fair Value Measurements (Details) $ in Thousands	Jun. 30, 2014 USD ($) item	Jun. 30, 2014 USD ($) item	Dec. 31, 2013 USD ($)
Fair Value Measurements
Number of employees covered under life insurance policies \| item	41	41
Combined face value of life insurance policies	$ 38,900	$ 38,900
Cash surrender value	3,000	3,000	$ 2,900
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)
Goodwill impairment	727	727
Contingent earn-out obligations
Reconciliation of the fair value of contingent earn-out obligations that use significant unobservable inputs (Level 3)
Balance at beginning of year		320
Issuances		200
Balance at end of period	520	520
Recurring basis \| Total
Fair Value Measurements
Cash and cash equivalents	49,759	49,759
Life insurance - cash surrender value	2,972	2,972
Contingent earn-out obligations	520	520
Recurring basis \| Quoted Market Prices In Active Markets for Identical Assets (Level 1)
Fair Value Measurements
Cash and cash equivalents	49,759	49,759
Recurring basis \| Significant Other Observable Inputs (Level 2)
Fair Value Measurements
Life insurance - cash surrender value	2,972	2,972
Recurring basis \| Significant Unobservable Inputs (Level 3)
Fair Value Measurements
Contingent earn-out obligations	$ 520	$ 520

Acquisitions (Details) $ in Millions	3 Months Ended		12 Months Ended
Acquisitions (Details) $ in Millions	Jun. 30, 2014 USD ($) item	Mar. 31, 2014 item	Dec. 31, 2013 item
Acquisitions
Number of acquisitions \| item	2	1	0
Fair value of consideration transferred	$ 40.2
Amount allocated to goodwill and identifiable intangible assets for acquisitions in northern Texas	$ 30.4

Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Discontinued Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Discontinued Operations
After-tax loss from discontinued operations			$ 15	$ 54
Interest expense allocated to discontinued operations			0
Revenue and pre-tax income (loss) related to discontinued operations
Revenue	$ 12	$ 49	12	22
Pre-tax loss			(25)	(93)
Operation located in Delaware \| Maximum
Discontinued Operations
After-tax loss from discontinued operations			$ 100	$ 100

Goodwill and Identifiable Intangible Assets, Net (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014
Changes in the carrying amount of goodwill
Balance at the beginning of year		$ 114,588
Additions		24,503
Impairment adjustment	$ 727	727
Balance at the end of period	$ 138,364	$ 138,364

Goodwill and Identifiable Intangible Assets, Net (Details 2) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Identifiable Intangible Assets, Net
Gross Book Value	$ 81,310	$ 73,504
Accumulated Amortization	(32,991)	(36,121)
Customer relationships
Identifiable Intangible Assets, Net
Gross Book Value	48,725	40,404
Accumulated Amortization	$ (23,520)	(20,978)
Customer relationships \| Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	1 year
Customer relationships \| Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	15 years
Backlog
Identifiable Intangible Assets, Net
Gross Book Value	$ 1,600	6,515
Accumulated Amortization	$ (117)	(6,515)
Backlog \| Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	1 year
Backlog \| Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Noncompete agreements
Identifiable Intangible Assets, Net
Gross Book Value	$ 2,890	2,890
Accumulated Amortization	$ (2,758)	(2,649)
Noncompete agreements \| Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Noncompete agreements \| Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	7 years
Tradenames
Identifiable Intangible Assets, Net
Gross Book Value	$ 28,095	23,695
Accumulated Amortization	$ (6,596)	$ (5,979)
Tradenames \| Minimum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	2 years
Tradenames \| Maximum
Identifiable Intangible Assets, Net
Estimated Useful Lives in Years	25 years

Long-Term Debt Obligations (Details) $ in Thousands	3 Months Ended		6 Months Ended
Long-Term Debt Obligations (Details) $ in Thousands	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 USD ($) item	Jun. 30, 2013 USD ($)	Jul. 22, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jun. 25, 2013 USD ($)	Jun. 24, 2013 USD ($)
Long-Term Debt Obligations
Total debt	$ 52,000		$ 52,000			$ 2,000
Less - current portion						(2,000)
Total long-term portion of debt	52,000		52,000
Additional per annum interest margin added under:
Payments of debt	2,000	$ 2,000	2,000	$ 2,000
Revolving credit facility
Long-Term Debt Obligations
Total debt	52,000		52,000
Borrowing capacity	175,000		175,000				$ 175,000	$ 125,000
Outstanding borrowings	52,000		52,000
Letters of credit amount outstanding	50,600		50,600
Credit available	$ 72,400		$ 72,400
Number of interest rate options \| item			2
Additional per annum interest margin added under:
Weighted average interest rate (as a percent)	3.50%		3.50%
Principal financial covenants
Leverage ratio	0.77		0.77
Number of quarters of capital expenditures, tax provision, dividends and stock repurchase payments used for calculation of fixed charge coverage ratio \| item			4
Revolving credit facility \| Subsequent events
Long-Term Debt Obligations
Borrowing capacity					$ 250,000
Revolving credit facility \| EAS
Long-Term Debt Obligations
Borrowing capacity	$ 2,500		$ 2,500
Revolving credit facility \| Actual
Principal financial covenants
Fixed charge coverage ratio	24.84		24.84
Revolving credit facility \| Minimum
Additional per annum interest margin added under:
Letter of credit fees (as a percent)			1.25%
Commitment fees payable on unused portion of the facility (as a percent)			0.20%
Revolving credit facility \| Minimum \| Covenant Requirement
Principal financial covenants
Net leverage ratio used as basis for other restrictions	2.00		2.00
Revolving credit facility \| Minimum \| Actual
Principal financial covenants
Fixed charge coverage ratio	2.00		2.00
Revolving credit facility \| Maximum
Additional per annum interest margin added under:
Letter of credit fees (as a percent)			2.00%
Commitment fees payable on unused portion of the facility (as a percent)			0.35%
Principal financial covenants
Permitted amount of acquisitions per transaction	$ 20,000		$ 20,000
Aggregate purchase price of current acquisition and acquisitions in the preceding 12 month period for determining permitted amount of acquisition per transaction	$ 50,000		$ 50,000
Revolving credit facility \| Maximum \| Through December 31, 2014
Principal financial covenants
Leverage ratio	3.00		3.00
Revolving credit facility \| Maximum \| Through December 31, 2015
Principal financial covenants
Leverage ratio	2.75		2.75
Revolving credit facility \| Maximum \| Through maturity
Principal financial covenants
Leverage ratio	2.50		2.50
Revolving credit facility \| Maximum \| Covenant Requirement
Principal financial covenants
Net leverage ratio used to determine exclusion of stock repurchases and the payment of dividends for calculation of the fixed charge coverage ratio	1.50		1.50
Revolving credit facility \| Maximum \| Actual
Principal financial covenants
Amount of stock repurchases to maintain maximum net leverage ratio			$ 25,000
Net leverage ratio after giving effect to stock repurchases for calculation of the fixed charge coverage ratio	1.50		1.50
Revolving credit facility \| Base rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: Less than 0.75
Additional per annum interest margin added under:
Variable rate basis			Base rate
Additional per annum interest margin (as a percent)			0.25%
Revolving credit facility \| Base rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 0.75 to 1.50
Additional per annum interest margin added under:
Variable rate basis			Base rate
Additional per annum interest margin (as a percent)			0.50%
Revolving credit facility \| Base rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 1.50 to 2.25
Additional per annum interest margin added under:
Variable rate basis			Base rate
Additional per annum interest margin (as a percent)			0.75%
Revolving credit facility \| Base rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 2.25 or greater
Additional per annum interest margin added under:
Variable rate basis			Base rate
Additional per annum interest margin (as a percent)			1.00%
Revolving credit facility \| Eurodollar rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: Less than 0.75
Additional per annum interest margin added under:
Variable rate basis			Eurodollar rate
Additional per annum interest margin (as a percent)			1.25%
Revolving credit facility \| Eurodollar rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 0.75 to 1.50
Additional per annum interest margin added under:
Variable rate basis			Eurodollar rate
Additional per annum interest margin (as a percent)			1.50%
Revolving credit facility \| Eurodollar rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 1.50 to 2.25
Additional per annum interest margin added under:
Variable rate basis			Eurodollar rate
Additional per annum interest margin (as a percent)			1.75%
Revolving credit facility \| Eurodollar rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 2.25 or greater
Additional per annum interest margin added under:
Variable rate basis			Eurodollar rate
Additional per annum interest margin (as a percent)			2.00%
Notes to former owners
Long-Term Debt Obligations
Total debt						$ 2,000
Additional per annum interest margin added under:
Weighted average interest rate (as a percent)	3.30%		3.30%

Commitments and Contingencies (Details) - Surety	6 Months Ended
Commitments and Contingencies (Details) - Surety	Jun. 30, 2014
Minimum
Surety
Percentage of business which has required bonds	25.00%
Maximum
Surety
Percentage of business which has required bonds	35.00%

Stockholders' Equity (Details) - shares shares in Millions	3 Months Ended		6 Months Ended
Stockholders' Equity (Details) - shares shares in Millions	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stock Options
Earnings Per Share
Anti-dilutive securities excluded from computation of earnings per share amount (in shares)	0.2	0.3	0.0	0.4

Stockholders' Equity (Details 2) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended	88 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014	Mar. 29, 2007
Reconciliation of the number of shares outstanding with the number of shares used in computing basic and diluted earnings per share
Common shares outstanding, end of period	37,748	37,257	37,748	37,257
Effect of using weighted average common shares outstanding	(42)	(67)	(104)	(129)
Shares used in computing earnings per share - basic	37,706	37,190	37,644	37,128
Effect of shares issuable under stock option plans based on the treasury stock method	144	121	165	107
Effect of contingently issuable restricted shares	30	54	105	114
Shares used in computing earnings per share - diluted	37,880	37,365	37,914	37,349
Number of shares of unvested contingently issuable restricted stock outstanding		100		100
Share Repurchase Program
Number of shares of outstanding common stock authorized to be acquired under a stock repurchase program	6,600		6,600			6,600	1,000
Minimum number of shares of common stock repurchased			100			6,000
Share repurchased			$ 505		$ 1,832
Average price (in dollars per share)			$ 16.29			$ 11.03

Subsequent Event (Details) - Facility - USD ($) $ in Millions	Jul. 22, 2014	Jun. 30, 2014	Jun. 25, 2013	Jun. 24, 2013
Subsequent Events
Borrowing capacity		$ 175.0	$ 175.0	$ 125.0
Subsequent events
Subsequent Events
Borrowing capacity	$ 250.0