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Goodwill and Other Intangible Assets - Additional Information (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
Goodwill And Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 7,026 $ 10,290 $ 17,406 $ 28,781