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Estimated Amortization Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
Remaining 2014 $ 12,358
2015 46,588
2016 36,228
2017 33,237
2018 31,377
2019 $ 30,609