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Goodwill and Intangible Assets - Estimated Annual Amortization Expense (Detail)
$ in Thousands
Sep. 30, 2015
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2015 $ 913
2016 1,273
2017 1,086
2018 953
2019 and beyond $ 1,155