Income Taxes Components of Income (Loss) Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Components of Income (Loss) before Income Taxes [Abstract]
Effective Income Tax Rate Reconciliation, Percent		106.80%	(161.10%)	(394.60%)
Deferred tax benefit			$ (55,626)	$ (5,126)
Document Period End Date			Jun. 30, 2020
Domestic	$ (11,060)	$ (6,469)	$ (13,740)	(16,500)
Foreign	11,062	16,502	33,479	13,426
Income (loss) before income taxes	$ 2	$ 10,033	$ 19,739	$ (3,074)