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Goodwill and Intangible Assets - Estimated Amortization Expense (Detail)
$ in Thousands
Sep. 30, 2015
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2015 (remaining) $ 1,686
2016 6,632
2017 6,551
2018 6,536
2019 6,494
2020 6,440
Thereafter $ 11,308