XML 109 R52.htm IDEA: XBRL DOCUMENT
v3.19.3

Acquisitions - Estimated Fair Values of Identifiable Intangible Assets and Related Weighted Average Amortization (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2019
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date |  | $ 190,800
Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 190,785 |
Weighted average amortization period at acquisition date | 8 years |
Customer relationships | Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 168,263 |
Weighted average amortization period at acquisition date | 7 years 10 months 24 days |
Backlog | Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 5,276 |
Weighted average amortization period at acquisition date | 15 days |
Trade names | Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 11,752 |
Weighted average amortization period at acquisition date | 15 years |
Non-compete agreements | Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 3,712 |
Weighted average amortization period at acquisition date | 4 years 3 months 18 days |
Curriculum | Acquisitions 2019 |  |
Business Acquisition [Line Items] |  |
Estimated fair value at acquisition date | $ 1,782 |
Weighted average amortization period at acquisition date | 10 years |

X
- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
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 increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
Name: | us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=pwr_Acquisitions2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OrderOrProductionBacklogMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=pwr_CurriculumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |