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Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 9 Months Ended
Sep. 30, 2013
May 08, 2012
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets purchase price allocation   $ 162,800
Backlog
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   900
Intangible assets preliminarily UsefulLife Less than 1 year  
Tradenames and Trademarks
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   27,600
Intangible assets preliminarily, UsefulLife 20 years  
Technology
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   15,300
Intangible assets preliminarily, UsefulLife 12 years  
Customer relationships
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   $ 119,000
Intangible assets preliminarily, UsefulLife 10 years