XML 64 R65.htm IDEA: XBRL DOCUMENT v2.4.1.9

Debt Obligations - Information on Borrowings under Current and Prior Credit Facility and Applicable Interest Rates (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Abstract]
Maximum amount outstanding during the period	$ 130,856us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod	$ 161,920us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Average daily amount outstanding under the credit facility	$ 29,814us-gaap_LineOfCreditFacilityAverageOutstandingAmount	$ 14,482us-gaap_LineOfCreditFacilityAverageOutstandingAmount
Weighted-average interest rate	2.71%pwr_LongTermDebtWeightedAverageInterestRateDuringPeriod	2.12%pwr_LongTermDebtWeightedAverageInterestRateDuringPeriod

X

- Definition

Long Term Debt Weighted Average Interest Rate During Period

+ References

No definition available.

+ Details

Name:	pwr_LongTermDebtWeightedAverageInterestRateDuringPeriod
Namespace Prefix:	pwr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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

X

- Definition

Maximum amount borrowed under the credit facility at any time during the period.

+ References

No definition available.

+ Details

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