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Income Taxes - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Income Tax Disclosure [Abstract]        
Income tax expense (benefit) $ 3,008 $ (171) $ 2,964 $ (71)