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Goodwill and Other Intangible Assets (Schedule of Future Estimated Amortization of Intangibles) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Schedule Of Amortized And Unamortized Intangible Assets [Line Items]  
2013 $ 35,336
2014 34,226
2015 33,607
2016 32,762
2017 30,955
Thereafter $ 243,047