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Goodwill and Intangible Assets - Future Amortization Expense of Finite-lived Intangible Assets (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
2015 $ 2,555  
2016 7,151  
2017 4,457  
2018 3,098  
2019 2,407  
Thereafter 4,850  
Net intangible assets, end of period $ 24,518 $ 114