Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable, net	$ 163,758	$ 119,877
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Contract assets	18,200	15,300
Contract with Customer, Liability [Abstract]
Contract liabilities	39,700	$ 25,700
Revenue recognized	$ 13,900