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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2016 | Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 487,145 | $ 469,748
Accumulated Amortization | (283,889) | (264,674)
Intangible Assets, Net | $ 203,256 | 205,074
Remaining Weighted Average Amortization Period in Years | 10 years 7 months 6 days |
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 247,198 | 236,731
Accumulated Amortization | (101,744) | (90,840)
Intangible Assets, Net | $ 145,454 | 145,891
Remaining Weighted Average Amortization Period in Years | 9 years 1 month 6 days |
Backlog [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 133,623 | 130,818
Accumulated Amortization | (131,086) | (126,954)
Intangible Assets, Net | $ 2,537 | 3,864
Remaining Weighted Average Amortization Period in Years | 9 months 18 days |
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 54,547 | 51,192
Accumulated Amortization | (11,313) | (9,525)
Intangible Assets, Net | $ 43,234 | 41,667
Remaining Weighted Average Amortization Period in Years | 18 years |
Non-compete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 29,280 | 28,560
Accumulated Amortization | (24,890) | (23,507)
Intangible Assets, Net | $ 4,390 | 5,053
Remaining Weighted Average Amortization Period in Years | 3 years 3 months 18 days |
Patented Rights and Developed Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 22,497 | 22,447
Accumulated Amortization | (14,856) | (13,848)
Intangible Assets, Net | $ 7,641 | $ 8,599
Remaining Weighted Average Amortization Period in Years | 4 years 6 months |

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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=66006027&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=66006027&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=66006027&loc=d3e16323-109275 + Details
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