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Goodwill and Intangible Assets - Estimated Future Amortization Expense (Detail)
$ in Thousands
Sep. 30, 2015
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2015 $ 605
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2016 2,048
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2017 1,784
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2018 1,581
Estimated Future Amortization Expense, For the fiscal year ending December 31, 2019 1,213
Estimated Future Amortization Expense, Thereafter $ 2,611