Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable, net	$ 155,926		$ 156,535
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Contract assets	32,300		24,200
Contract with Customer, Liability [Abstract]
Contract liabilities	34,800		$ 34,600
Revenue recognized	$ 22,000	$ 11,100