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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
Income Tax Disclosure [Abstract]        
Income tax provision $ 1,155 $ 1,035 $ 1,536 $ 907
Income tax expense (benefit) specific to the period     (700) $ (500)
Unrecognized tax benefits that would impact effective tax rate $ 1,500   $ 1,500