Income Taxes - Narrative (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]
Expense from income taxes	$ 10,072	$ 7,704	$ 16,535	$ 11,829
Deferred tax assets, tax credit carryforwards	$ 6,200		$ 6,200