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Goodwill and Other Intangible Assets - Estimated Future Aggregate Amortization Expense of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]  
Remainder of 2013 $ 15,161
2014 18,363
2015 15,961
2016 15,093
2017 14,110
Thereafter 95,327
Total $ 174,015