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Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
 1 Months Ended
May 31, 2012
May 08, 2012
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   $ 162,800
Backlog
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, Amount   900
Backlog | Maximum
    
Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Line Items]    
Intangible assets preliminarily, UsefulLife 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