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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 487,074 | $ 484,336
Accumulated Amortization | (305,140) | (297,313)
Intangible Assets, Net | $ 181,934 | 187,023
Remaining Weighted Average Amortization Period in Years | 10 years 3 months 18 days |
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 246,049 | 244,329
Accumulated Amortization | (115,894) | (110,640)
Intangible Assets, Net | $ 130,155 | 133,689
Remaining Weighted Average Amortization Period in Years | 8 years 6 months |
Backlog [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 134,152 | 133,592
Accumulated Amortization | (133,227) | (132,441)
Intangible Assets, Net | $ 925 | 1,151
Remaining Weighted Average Amortization Period in Years | 8 months 12 days |
Trade Names [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 55,063 | 54,723
Accumulated Amortization | (13,773) | (12,855)
Intangible Assets, Net | $ 41,290 | 41,868
Remaining Weighted Average Amortization Period in Years | 17 years 6 months |
Non-compete Agreements [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 29,325 | 29,212
Accumulated Amortization | (25,974) | (25,546)
Intangible Assets, Net | $ 3,351 | 3,666
Remaining Weighted Average Amortization Period in Years | 2 years 9 months 18 days |
Patented Rights and Developed Technology [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization | $ 22,485 | 22,480
Accumulated Amortization | (16,272) | (15,831)
Intangible Assets, Net | $ 6,213 | $ 6,649
Remaining Weighted Average Amortization Period in Years | 3 years 10 months 24 days |

X
- 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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