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]
Estimated Annual Effective Tax Rate Used to Calculate Income Tax Expense (Benefit)			22.60%	14.60%
Federal statutory income tax rate, percent			21.00%	21.00%
Income tax expense	$ (2,248)	$ (2,701)	$ (3,869)	$ (3,785)
Income before income taxes	$ 9,622	$ 7,783	$ 17,331	$ 15,344
Effective income tax rate reconciliation, percent	23.40%	34.70%	22.30%	24.70%
Unrecognized Tax Benefits	$ 2,071	$ 1,752	$ 2,071	$ 1,752