Represents the earnings of the acquiree prior to the acquisition date.

No definition available.

Name:	fix_BusinessAcquisitionPreAcquisitionEarnings
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of stock repurchases to maintain maximum net leverage ratio.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantAmountOfStockRepurchasesToMaintainMaximumNetLeverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of quarters of capital expenditures, tax provision, dividends and stock repurchase payments used for the calculation of the fixed charge coverage ratio.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantCapitalExpendituresTaxProvisionsDividendsAndStockRepurchasePaymentsUsedForCalculationOfFixedChargeCoverageRatioNumberOfQuarters
Namespace Prefix:	fix_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the ratio of consolidated adjusted earnings before, interest, taxes, depreciation and amortization, 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 required to be maintained under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantFixedChargeCoverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the ratio of consolidated total debt to consolidated adjusted earnings before, interest, taxes, depreciation and amortization required to be maintained under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantLeverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of quarters of net earnings used for the calculation of the credit facility adjusted EBITDA.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantNetEarningsUsedForCalculationOfCreditFacilityAdjustedEBITDANumberOfQuarters
Namespace Prefix:	fix_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the net leverage ratio determine after giving effect to stock repurchases for calculation of the fixed charge coverage ratio under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantNetLeverageRatioAfterGivingEffectToStockRepurchasesForCalculatingFixedChargeCoverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the net leverage ratio used to determine exclusion of stock repurchases and the payment of dividends for calculation of the fixed charge coverage ratio under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantNetLeverageRatioUsedToDetermineExclusionOfStockRepurchasesAndDividendPaymentsForCalculatingFixedChargeCoverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the aggregate purchase price of current acquisition and acquisitions in the preceding twelve month period used for determining the permitted amount of acquisition per transaction under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantOtherRestrictionsAggregatePurchasePriceOfAcquisitions
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the net leverage ratio as defined in the financial covenants which is used as a basis to determine other restrictions.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantOtherRestrictionsNetLeverageRatio
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of acquisition per transaction permitted under the financial covenants.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantOtherRestrictionsPermittedAcquisitionAmountPerTransaction
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the net leverage ratio used to determine the credit availability under the revolving credit facility.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentCovenantRatioToDetermineCreditAvailability
Namespace Prefix:	fix_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	fix_DebtInstrumentFinancialCovenantsAbstract
Namespace Prefix:	fix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of interest rate options.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentInterestRateOptionsNumber
Namespace Prefix:	fix_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the market rate relating to interest options under the Facility.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentMarketRate
Namespace Prefix:	fix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the period of Credit Facility Adjusted EBITDA for determining additional margins.

+ References

No definition available.

+ Details

Name:	fix_DebtInstrumentTermOfEarningsBeforeInterestTaxDepreciationAndAmortizationForDeterminationOfAdditionalMargins
Namespace Prefix:	fix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	fix_DebtInstrumentVariableRateAbstract
Namespace Prefix:	fix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the earnings before deduction of interest expenses, taxes, depreciation and amortization.

+ References

No definition available.

+ Details

Name:	fix_EarningsBeforeInterestTaxDepreciationAndAmortization
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the earnings before deduction of interest expenses, taxes, depreciation and amortization attributable to noncontrolling interests.

+ References

No definition available.

+ Details

Name:	fix_EarningsBeforeInterestTaxDepreciationAndAmortizationAttributableToNoncontrollingInterest
Namespace Prefix:	fix_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the fees for the letter of credit facility, expressed as a percent based on the ratio of consolidated total indebtedness to credit facility adjusted EBITDA, as defined in the credit agreement.

+ References

No definition available.

+ Details

Name:	fix_LetterOfCreditFeesPercentage
Namespace Prefix:	fix_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	fix_MarketRatesAbstract
Namespace Prefix:	fix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of trailing months used to calculate available credit.

+ References

No definition available.

+ Details

Name:	fix_NumberOfTrailingMonthsToCalculateAvailableCredit
Namespace Prefix:	fix_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	fix_ReconciliationOfEarningsBeforeInterestTaxDepreciationAndAmortizationToNetIncomeAbstract
Namespace Prefix:	fix_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

+ Details

Name:	us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

+ Details

Name:	us-gaap_CapitalLeaseObligations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45023-112735

+ Details

Name:	us-gaap_CapitalLeaseObligationsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateEffectivePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

For an unclassified balance sheet, the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b),(c)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=18498875&loc=d3e38679-109324

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

+ Details

Name:	us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillAndIntangibleAssetImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

+ Details

Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net amount of operating interest income (expense).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.10)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 10

-Article 9

+ Details

Name:	us-gaap_InterestIncomeExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongTermDebtOtherDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 30

-Section 50

-Paragraph 1A

-Subparagraph (b)(1)(i)

-URI http://asc.fasb.org/extlink&oid=34720971&loc=SL6224234-111729

+ Details

Name:	us-gaap_PledgedAssetsNotSeparatelyReportedOnStatementOfFinancialPosition
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4K

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591552-111686

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 45

-Paragraph 19

-URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569616-111683

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 50

-Paragraph 1A

-Subparagraph (a),(c)

-URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 810

-SubTopic 10

-Section 55

-Paragraph 4J

-URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686

+ Details

Name:	us-gaap_ProfitLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_NotesPayableOtherPayablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_SubordinatedDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Long-Term Debt Obligations (Details 3) (USD $)	3 Months Ended								12 Months Ended			1 Months Ended
Long-Term Debt Obligations (Details 3) (USD $)	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014	Jul. 22, 2014	Jul. 21, 2014	May 01, 2014
Reconciliation of Earnings before Interest Tax Depreciation and Amortization to Net Income [Abstract]
Net income including noncontrolling interests	$ 11,821,000us-gaap_ProfitLoss	$ 9,379,000us-gaap_ProfitLoss	$ 6,336,000us-gaap_ProfitLoss	$ 1,063,000us-gaap_ProfitLoss	$ 5,935,000us-gaap_ProfitLoss	$ 11,612,000us-gaap_ProfitLoss	$ 8,314,000us-gaap_ProfitLoss	$ 2,695,000us-gaap_ProfitLoss	$ 28,599,000us-gaap_ProfitLoss	$ 28,556,000us-gaap_ProfitLoss	$ 11,849,000us-gaap_ProfitLoss
Income taxes-continuing operations									11,614,000us-gaap_IncomeTaxExpenseBenefit	18,148,000us-gaap_IncomeTaxExpenseBenefit	10,045,000us-gaap_IncomeTaxExpenseBenefit
Stock compensation expense									4,800,000	4,000,000	2,800,000
Additional per annum interest margin added under:
Payments of debt									2,000,000us-gaap_RepaymentsOfLongTermDebt	5,400,000us-gaap_RepaymentsOfLongTermDebt	7,349,000us-gaap_RepaymentsOfLongTermDebt
Other disclosures
Capital lease obligation pertaining to acquisition in northern Texas	800,000us-gaap_CapitalLeaseObligations								800,000us-gaap_CapitalLeaseObligations
Current portion of capital lease obligations	317,000us-gaap_CapitalLeaseObligationsCurrent								317,000us-gaap_CapitalLeaseObligationsCurrent
Revolving credit facility
Long-Term Debt Obligations
Borrowing capacity													250,000,000	175,000,000
Financing and professional cost													600,000
Unamortized costs													1,000,000
Outstanding borrowings	38,500,000								38,500,000
Letters of credit amount outstanding	45,000,000								45,000,000
Credit available	138,900,000								138,900,000
Book value of assets pledged as collateral	57,600,000								57,600,000
Number of quarters of net earnings used for the calculation of the credit facility adjusted EBITDA									4
Reconciliation of Earnings before Interest Tax Depreciation and Amortization to Net Income [Abstract]
Net income including noncontrolling interests									28,599,000
Income taxes-continuing operations									11,614,000
Interest expense, net									1,840,000
Depreciation and amortization expense									21,336,000
Stock compensation expense									4,806,000
Income taxes - discontinued operation									(10,000)
Goodwill impairment									727,000
EBITDA attributable to noncontrolling interests									(6,471,000)
Credit Facility Adjusted EBITDA									65,187,000
Pre-acquisition results of acquired companies, as defined in the credit agreement									2,746,000
Principal financial covenants
Leverage ratio	0.62								0.62
Number of quarters of capital expenditures, tax provision, dividends and stock repurchase payments used for calculation of fixed charge coverage ratio									4
Number of interest rate options									2
Period of Credit Facility Adjusted EBITDA for determining additional margins									12 months
Debt instrument covenant credit availability ratio	2.75								2.75
Number of trailing months used to calculate available credit									12 months
Additional per annum interest margin added under:
Estimated interest rate (as a percent)	1.40%								1.40%
Revolving credit facility \| EAS
Long-Term Debt Obligations
Borrowing capacity	2,500,000								2,500,000
Outstanding borrowings	0								0
Credit available					2,500,000					2,500,000
Other disclosures
Weighted average interest rate (as a percent)					2.70%					2.70%
Revolving credit facility \| Actual
Principal financial covenants
Fixed charge coverage ratio	18.90								18.90
Revolving credit facility \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: Less than 0.75
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 \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 0.75 to 1.50
Additional per annum interest margin added under:
Letter of credit fees (as a percent)									1.50%
Commitment fees payable on unused portion of the facility (as a percent)									0.25%
Revolving credit facility \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 1.50 to 2.25
Additional per annum interest margin added under:
Letter of credit fees (as a percent)									1.75%
Commitment fees payable on unused portion of the facility (as a percent)									0.30%
Revolving credit facility \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: 2.25 or greater
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%
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
Long-Term Debt Obligations
Credit available	222,400,000								222,400,000
Principal financial covenants
Permitted amount of acquisitions per transaction	25,000,000								25,000,000
Aggregate purchase price of current acquisition and acquisitions in the preceding 12 month period for determining permitted amount of acquisition per transaction	60,000,000								60,000,000
Revolving credit facility \| Maximum \| Through December 31, 2015
Principal financial covenants
Leverage ratio	2.75								2.75
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									25,000,000
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
Market rates relating to interest options
Interest rate margin (as a percent)									0.25%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									0.50%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									0.75%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									1.00%
Additional per annum interest margin added under:
Additional per annum interest margin (as a percent)									1.00%
Revolving credit facility \| Base rate \| Federal Funds Rate
Market rates relating to interest options
Interest rate margin (as a percent)									0.50%
Market rate (as a percent)	0.63%								0.63%
Additional per annum interest margin added under:
Additional per annum interest margin (as a percent)									0.50%
Revolving credit facility \| Base rate \| Wells Fargo Bank, N.A. Prime Rate
Market rates relating to interest options
Market rate (as a percent)	3.25%								3.25%
Revolving credit facility \| Base rate \| One-month LIBOR
Market rates relating to interest options
Variable rate basis									One-month LIBOR
Interest rate margin (as a percent)									1.00%
Market rate (as a percent)	1.17%								1.17%
Additional per annum interest margin added under:
Variable rate basis									One-month LIBOR
Additional per annum interest margin (as a percent)									1.00%
Revolving credit facility \| Base rate \| Six-month LIBOR
Market rates relating to interest options
Variable rate basis									Six-month LIBOR
Additional per annum interest margin added under:
Variable rate basis									Six-month LIBOR
Revolving credit facility \| Eurodollar rate \| Consolidated Total Indebtedness to Credit Facility Adjusted EBITDA: Less than 0.75
Market rates relating to interest options
Interest rate margin (as a percent)									1.25%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									1.50%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									1.75%
Additional per annum interest margin added under:
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
Market rates relating to interest options
Interest rate margin (as a percent)									2.00%
Additional per annum interest margin added under:
Additional per annum interest margin (as a percent)									2.00%
Revolving credit facility \| Eurodollar rate \| One-month LIBOR
Market rates relating to interest options
Market rate (as a percent)	0.17%								0.17%
Revolving credit facility \| Eurodollar rate \| Six-month LIBOR
Market rates relating to interest options
Market rate (as a percent)	0.36%								0.36%
Other debt \| Dyna Ten
Other disclosures
Capital lease obligation pertaining to acquisition in northern Texas	800,000								800,000						700,000
Current portion of capital lease obligations	300,000								300,000
Notes to former owners
Long-Term Debt Obligations
Outstanding borrowings	1,000,000								1,000,000
Additional per annum interest margin added under:
Payments of debt												$ 2,000,000
Other disclosures
Weighted average interest rate (as a percent)	2.50%		3.30%						2.50%			3.30%