XML 53 R43.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Acquisitions (2016 and 2015 Acquisitions) - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 | Sep. 30, 2016 | Dec. 31, 2015
Business Acquisition [Line Items] |  |  |
Goodwill acquired |  | $ 44,610 | $ 51,935
Other intangible assets, acquired | $ 24,987 | 11,467 | 24,987
Acquisitions 2016 [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Net tangible assets acquired |  | 40,000 |
Goodwill acquired |  | 44,600 |
Other intangible assets, acquired |  | $ 11,500 |
Acquisitions 2015 [Member] |  |  |
Business Acquisition [Line Items] |  |  |
Net tangible assets acquired | 2,100 |  |
Goodwill acquired | 4,400 |  |
Other intangible assets, acquired | $ 3,300 |  | $ 3,300

X
- Definition Amount of tangible assets acquired less liabilities assumed at the acquisition date. + References No definition available. + Details
Name: | pwr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleAssets
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_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
Name: | us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
Name: | us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=pwr_Acquisitions2016Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=pwr_Acquisitions2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |