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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