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Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 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
Intangible assets, gross     431,232
Accumulated Amortization (230,712)   (223,355)
Amortization Expense (8,245) (5,301)  
Additions 21,048    
Foreign Currency Adjustments (1,107)    
Intangible Assets Subject to Amortization, Net 215,073    
Intangible assets, net 219,573   207,877
Remaining Weighted Average Amortization Period in Years 11 years 7 months 6 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 (3,650)    
Additions 11,131    
Foreign Currency Adjustments 195    
Intangible Assets Subject to Amortization, Net 147,483    
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 (2,957)    
Additions 4,908    
Foreign Currency Adjustments 730    
Intangible Assets Subject to Amortization, Net 12,279    
Remaining Weighted Average Amortization Period in Years 10 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 (466)    
Additions 3,917    
Foreign Currency Adjustments (1,954)    
Intangible Assets Subject to Amortization, Net 37,611    
Remaining Weighted Average Amortization Period in Years 22 years 8 months 12 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 (652)    
Additions 688    
Foreign Currency Adjustments (71)    
Intangible Assets Subject to Amortization, Net 5,999    
Remaining Weighted Average Amortization Period in Years 3 years 3 months 18 days    
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 (520)    
Additions 404    
Foreign Currency Adjustments (7)    
Intangible Assets Subject to Amortization, Net $ 11,701    
Remaining Weighted Average Amortization Period in Years 5 years 1 month 6 days