Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2022	Sep. 30, 2021
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Accounts receivable, net of allowance for expected credit losses ($4,326 and $4,318, respectively)	$ 150,274	$ 119,877
Contract with Customer, Asset, after Allowance for Credit Loss, Current [Abstract]
Contract assets	20,800	15,300
Contract with Customer, Liability [Abstract]
Current contract liabilities	33,132	25,724
Contract liabilities	33,100	$ 25,700
Revenue recognized	$ 13,400