|
Equity-Based Compensation - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
|
3 Months Ended |
|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Dec. 31, 2014
|
| 2007 Plan [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Aggregate number of shares of common stock that may be issued |
4,000,000pwr_CommonStockAvailableForAwardsPursuantToPlan
/ us-gaap_StatementEquityComponentsAxis
= pwr_TwoThousandAndSevenPlanMember
|
|
|
| 2011 Plan [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Aggregate number of shares of common stock that may be issued |
11,750,000pwr_CommonStockAvailableForAwardsPursuantToPlan
/ us-gaap_StatementEquityComponentsAxis
= pwr_TwoThousandAndElevenPlanMember
|
|
|
| Restricted Stock Units to be Settled in Cash [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Number of common stock shares that may be received by RSU holder |
1pwr_NumberOfCommonStockSharesReceivedByRsuHolder
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
|
|
| Compensation expense related to Restricted Stock Units to be settled in cash |
$ 1.3us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
$ 0.7us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
|
| Payment to settle liabilities under compensation plan |
0.9us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
2.1us-gaap_EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
|
| Accrued liabilities under Compensation Plan |
3.3us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
|
2.9us-gaap_DeferredCompensationShareBasedArrangementsLiabilityCurrent
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockUnitsToBeSettledInCashMember
|
| Restricted Stock Units to be Settled in Cash [Member] | Maximum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Vesting period for restricted stock and restricted stock units |
3 years
|
|
|
| Restricted Stock Units to be Settled in Cash [Member] | Minimum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Vesting period for restricted stock and restricted stock units |
2 years
|
|
|
| Restricted Stock and Restricted Stock Units to be Settled in Common Stock [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Granted, shares |
1,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
1,300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
|
| Granted, weighted average grant date fair value, per share |
$ 27.77us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
$ 35.19us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
|
| Awards vested |
1,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
1,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
|
| Fair value of restricted stock, vested |
33.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
33.5us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
|
| Unrecognized compensation cost, related to unvested restricted stock, total |
53.4us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= pwr_RestrictedStockAndRestrictedStockUnitsToBeSettledInCommonStockMember
|
|
|
| Expected weighted average period to recognize compensation cost on restricted stock and RSUs to be settled in stock (in years) |
2 years 29 days
|
|
|
| Restricted Stock and Restricted Stock Units to be Settled in Common Stock [Member] | Maximum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Vesting period for restricted stock and restricted stock units |
3 years
|
|
|
| Restricted Stock and Restricted Stock Units to be Settled in Common Stock [Member] | Minimum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Vesting period for restricted stock and restricted stock units |
2 years
|
|
|
| Performance Units [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Granted, shares |
200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
|
|
|
| Granted, weighted average grant date fair value, per share |
$ 28.16us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
|
|
|
| Awards vested |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
|
|
|
| Required performance period |
3 years
|
|
|
| Performance units vesting conditions |
These performance units cliff-vest at the end of a three-year performance period based on achievement of three-year company financial performance targets and strategic initiatives established by the Compensation Committee.
|
|
|
| Compensation costs |
$ 0.7us-gaap_EmployeeBenefitsAndShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
|
|
|
| Number of common shares issued in connection with performance units |
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
|
|
|
| Performance Units [Member] | Maximum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Performance units performance percentage |
200.00%pwr_PerformanceBasedAwardPerformancePercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
|
|
|
| Performance Units [Member] | Minimum [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Performance units performance percentage |
0.00%pwr_PerformanceBasedAwardPerformancePercentage
/ us-gaap_AwardTypeAxis
= us-gaap_PerformanceSharesMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
|
|
|