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Goodwill and Other Intangible Assets - Estimated Aggregate Future Amortization Expense for Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]    
Remainder of 2013 $ 2,295  
2014 2,271  
2015 1,489  
2016 777  
2017 215  
Thereafter 280  
Future Amortization Expense, Total $ 7,327 $ 8,147