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Estimated Amortization Expense of Existing Finite-Lived Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Expected Amortization Expense [Line Items]  
Remainder of fiscal 2012 $ 11,403
Fiscal 2013 13,088
Fiscal 2014 9,100
Fiscal 2015 4,134
Fiscal 2016 $ 1,222