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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, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Dec. 31, 2012
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | $ 377,418
Intangible assets, gross |  |  |  |  | 381,918
Accumulated Amortization | (214,473) |  | (214,473) |  | (198,082)
Amortization Expense | (7,026) | (10,290) | (17,406) | (28,781) |
Additions |  |  | 25,934 |  |
Foreign Currency Adjustments |  |  | (1,615) |  |
Intangible Assets, Net, subject to amortization | 186,249 |  | 186,249 |  |
Intangible assets, net | 190,749 |  | 190,749 |  | 183,836
Remaining Weighted Average Amortization Period in Years |  |  | 12 years 8 months 12 days |  |
Indefinite-lived Intangible Assets | 4,500 |  | 4,500 |  | 4,500
Customer Relationships [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | 170,465
Accumulated Amortization |  |  |  |  | (47,777)
Amortization Expense |  |  | (8,575) |  |
Additions |  |  | 14,155 |  |
Foreign Currency Adjustments |  |  | (1,141) |  |
Intangible Assets, Net, subject to amortization | 127,127 |  | 127,127 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 10 years 10 months 24 days |  |
Backlog [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | 126,057
Accumulated Amortization |  |  |  |  | (119,068)
Amortization Expense |  |  | (4,675) |  |
Additions |  |  | 7,314 |  |
Foreign Currency Adjustments |  |  | (24) |  |
Intangible Assets, Net, subject to amortization | 9,604 |  | 9,604 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 1 year 8 months 12 days |  |
Trade Names [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | 32,559
Accumulated Amortization |  |  |  |  | (3,014)
Amortization Expense |  |  | (838) |  |
Additions |  |  | 4,121 |  |
Foreign Currency Adjustments |  |  | (206) |  |
Intangible Assets, Net, subject to amortization | 32,622 |  | 32,622 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 26 years 10 months 24 days |  |
Non-compete Agreements [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | 27,406
Accumulated Amortization |  |  |  |  | (20,706)
Amortization Expense |  |  | (1,737) |  |
Additions |  |  | 344 |  |
Foreign Currency Adjustments |  |  | (155) |  |
Intangible Assets, Net, subject to amortization | 5,152 |  | 5,152 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 2 years 8 months 12 days |  |
Patented Rights and Developed Technology [Member] |  |  |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |  |  |
Intangible Assets |  |  |  |  | 20,931
Accumulated Amortization |  |  |  |  | (7,517)
Amortization Expense |  |  | (1,581) |  |
Foreign Currency Adjustments |  |  | (89) |  |
Intangible Assets, Net, subject to amortization | $ 11,744 |  | $ 11,744 |  |
Remaining Weighted Average Amortization Period in Years |  |  | 5 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 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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