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Estimated Future Amortization Expense (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]  
Remainder of 2014 $ 6,209
2015 11,557
2016 11,145
2017 9,564
2018 8,688
2019 2,897
Future estimated amortization expense, total $ 50,060