CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Sep. 30, 2023
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Allowance for expected credit losses	$ 6,844	$ 8,057
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	125,000,000	125,000,000
Common stock, shares issued (in shares)	68,464,925	71,294,247
Common stock, shares outstanding (in shares)	54,614,041	57,832,378
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]
Treasury stock, shares (in shares)	13,850,884	13,461,869