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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 473,792 | $ 468,951
Accumulated Amortization | (239,489) | (225,367)
Intangible Assets, Net | $ 234,303 | 243,584
Remaining Weighted Average Amortization Period in Years | 11 years 2 months 12 days |
Customer Relationships [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 239,329 | 235,851
Accumulated Amortization | (71,768) | (63,764)
Intangible Assets, Net | $ 167,561 | 172,087
Remaining Weighted Average Amortization Period in Years | 10 years 3 months 18 days |
Backlog [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 132,681 | 133,704
Accumulated Amortization | (124,960) | (122,265)
Intangible Assets, Net | $ 7,721 | 11,439
Remaining Weighted Average Amortization Period in Years | 10 months 24 days |
Trade Names [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 51,005 | 49,664
Accumulated Amortization | (7,682) | (6,278)
Intangible Assets, Net | $ 43,323 | 43,386
Remaining Weighted Average Amortization Period in Years | 18 years 10 months 24 days |
Non-compete Agreements [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 28,245 | 27,659
Accumulated Amortization | (22,294) | (21,365)
Intangible Assets, Net | $ 5,951 | 6,294
Remaining Weighted Average Amortization Period in Years | 3 years 4 months 24 days |
Patented Rights and Developed Technology [Member] |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 22,532 | 22,073
Accumulated Amortization | (12,785) | (11,695)
Intangible Assets, Net | $ 9,747 | $ 10,378
Remaining Weighted Average Amortization Period in Years | 4 years 4 months 24 days |

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- Definition Finite And Indefinite Lived Intangible Assets [Line Items] + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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