Income Taxes - Components of Income Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Domestic	$ (3,009)	$ 10,930	$ 14,199	$ 14,244
Foreign	5,978	6,449	8,113	14,661
Income before income taxes	$ 2,969	$ 17,379	$ 22,312	$ 28,905