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Goodwill and Other Intangible Assets - Estimated Future Aggregate Amortization Expense of Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Schedule Of Estimated Future Amortization Expense [Line Items]  
2013 $ 20,197
2014 18,340
2015 15,994
2016 15,122
2017 14,132
Thereafter 95,551
Total $ 179,336