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Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]  
Remainder of 2014 $ 9,414
2015 11,336
2016 10,973
2017 9,512
2018 8,688
2019 2,895
Future estimated amortization expense, total $ 52,818