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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | $ 426,732
Indefinite-lived Intangible Assets | 4,500 |  | 4,500 |  | 4,500
Intangible assets, gross |  |  |  |  | 431,232
Accumulated Amortization | (248,197) |  | (248,197) |  | (223,355)
Amortization Expense | (9,538) | (7,026) | (26,398) | (17,406) |
Additions |  |  | 51,198 |  |
Foreign Currency Translation Adjustments |  |  | (3,217) |  |
Intangible Assets Subject to Amortization, Net | 224,960 |  | 224,960 |  |
Intangible assets, net | 229,460 |  | 229,460 |  | 207,877
Remaining Weighted Average Amortization Period in Years |  |  | 11 years 8 months 12 days |  |
Customer Relationships [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | 199,224
Accumulated Amortization |  |  |  |  | (59,417)
Amortization Expense |  |  | (11,439) |  |
Additions |  |  | 34,106 |  |
Foreign Currency Translation Adjustments |  |  | (2,605) |  |
Intangible Assets Subject to Amortization, Net | 159,869 |  | 159,869 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 10 years 7 months 6 days |  |
Backlog [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | 136,831
Accumulated Amortization |  |  |  |  | (127,233)
Amortization Expense |  |  | (9,877) |  |
Additions |  |  | 7,512 |  |
Foreign Currency Translation Adjustments |  |  | (74) |  |
Intangible Assets Subject to Amortization, Net | 7,159 |  | 7,159 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 1 year 4 months 24 days |  |
Trade Names [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | 40,342
Accumulated Amortization |  |  |  |  | (4,228)
Amortization Expense |  |  | (1,521) |  |
Additions |  |  | 6,413 |  |
Foreign Currency Translation Adjustments |  |  | (389) |  |
Intangible Assets Subject to Amortization, Net | 40,617 |  | 40,617 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 21 years 1 month 6 days |  |
Non-compete Agreements [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | 28,895
Accumulated Amortization |  |  |  |  | (22,861)
Amortization Expense |  |  | (2,000) |  |
Additions |  |  | 2,763 |  |
Foreign Currency Translation Adjustments |  |  | (140) |  |
Intangible Assets Subject to Amortization, Net | 6,657 |  | 6,657 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 3 years 6 months |  |
Patented Rights and Developed Technology [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible assets subject to amortization |  |  |  |  | 21,440
Accumulated Amortization |  |  |  |  | (9,616)
Amortization Expense |  |  | (1,561) |  |
Additions |  |  | 404 |  |
Foreign Currency Translation Adjustments |  |  | (9) |  |
Intangible Assets Subject to Amortization, Net | $ 10,658 |  | $ 10,658 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 4 years 8 months 12 days |  |

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- Definition Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for foreign currency translation adjustments. + 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 Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + 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 (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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