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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2012
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets |  | $ 377,418 |
Intangible assets, gross |  | 381,918 |
Accumulated Amortization | (202,780) | (198,082) |
Amortization Expense | (5,301) |  | (9,165)
Additions | 920 |  |
Foreign Currency Adjustments | (940) |  |
Intangible Assets, Net, subject to amortization | 174,015 |  |
Intangible assets, net | 178,515 | 183,836 |
Remaining Weighted Average Amortization Period in Years | 12 years 8 months 12 days |  |
Indefinite-lived Intangible Assets, Beginning Balance |  | 4,500 |
Addition to indefinite lived intangible assets |  |  |
Indefinite-lived Intangible Assets, Ending Balance | 4,500 |  |
Customer Relationships [Member] |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets |  | 170,465 |
Accumulated Amortization |  | (47,777) |
Amortization Expense | (2,804) |  |
Additions | 483 |  |
Foreign Currency Adjustments | (727) |  |
Intangible Assets, Net, subject to amortization | 119,640 |  |
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 | (1,104) |  |
Additions | 393 |  |
Foreign Currency Adjustments | (14) |  |
Intangible Assets, Net, subject to amortization | 6,264 |  |
Remaining Weighted Average Amortization Period in Years | 2 years |  |
Trade Names [Member] |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets |  | 32,559 |
Accumulated Amortization |  | (3,014) |
Amortization Expense | (271) |  |
Foreign Currency Adjustments | (102) |  |
Intangible Assets, Net, subject to amortization | 29,172 |  |
Remaining Weighted Average Amortization Period in Years | 27 years |  |
Non-compete Agreements [Member] |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets |  | 27,406 |
Accumulated Amortization |  | (20,706) |
Amortization Expense | (589) |  |
Additions | 44 |  |
Foreign Currency Adjustments | (67) |  |
Intangible Assets, Net, subject to amortization | 6,088 |  |
Remaining Weighted Average Amortization Period in Years | 3 years |  |
Patented Rights and Developed Technology [Member] |  |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |  |
Intangible assets |  | 20,931 |
Accumulated Amortization |  | (7,517) |
Amortization Expense | (533) |  |
Foreign Currency Adjustments | (30) |  |
Intangible Assets, Net, subject to amortization | $ 12,851 |  |
Remaining Weighted Average Amortization Period in Years | 6 years 8 months 12 days |  |

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