Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Sep. 30, 2019
Income Tax Disclosure [Abstract]      
Income tax expense (benefit) $ (5,397) $ 605  
Federal statutory rate (as a percent) 21.00%    
Unrecognized tax benefits $ 12,579   $ 15,526
Unrecognized tax benefits that would impact effective tax rate 9,365   11,417
Decrease reasonably possible in next 12 months 3,340    
Total penalties and interest accrued $ 2,730   $ 2,880