XML 71 R58.htm IDEA: XBRL DOCUMENT v3.3.1.900

Detail of Certain Balance Sheet Accounts - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2014
Condensed Balance Sheet Statements, Captions [Line Items]
Provision for long-term contract receivable	$ 49,900	$ 52,500	$ 102,460
Sunrise Powerlink Project [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Provision for long-term contract receivable			$ 102,500

X

- Definition

Provision for longterm contract receivable.

+ References

No definition available.

+ Details

Name:	pwr_ProvisionForLongtermContractReceivable
Namespace Prefix:	pwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=pwr_SunrisePowerlinkProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: