Leases - Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Lease, Cost [Abstract]
Operating lease costs	$ 3,064	$ 2,171
Amortization of assets	91	75
Interest on lease liabilities	4	3
Total finance lease costs	95	78
Variable lease cost	2	518
Short-term lease costs	184	354
Sublease income	(2)
Total lease costs	$ 3,343	$ 3,121