CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Sep. 30, 2023		54,840
Beginning balance at Sep. 30, 2023	$ 745,768	$ 549	$ 346,181	$ 431,140	$ (32,102)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	2,264		2,264
Release of restricted stock, net of shares withheld for taxes (in shares)		758
Release of restricted stock, net of shares withheld for taxes	8	$ 8
Taxes paid related to net share settlement of equity awards	(3,253)		(3,253)
Foreign currency translation gain (loss)	4,633				4,633
Purchase and retirement of treasury stock (in shares)		(355)
Purchase and retirement of treasury stock	(3,007)	$ (4)	(1,322)	(1,681)
Net income	28,470			28,470
Ending balance (in shares) at Dec. 31, 2023		55,243
Ending balance at Dec. 31, 2023	774,883	$ 553	343,870	457,929	(27,469)
Beginning balance (in shares) at Sep. 30, 2023		54,840
Beginning balance at Sep. 30, 2023	745,768	$ 549	346,181	431,140	(32,102)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	49,949
Ending balance (in shares) at Mar. 31, 2024		55,027
Ending balance at Mar. 31, 2024	800,396	$ 551	345,174	477,683	(23,012)
Beginning balance (in shares) at Dec. 31, 2023		55,243
Beginning balance at Dec. 31, 2023	774,883	$ 553	343,870	457,929	(27,469)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	2,580		2,580
Release of restricted stock, net of shares withheld for taxes (in shares)		89
Release of restricted stock, net of shares withheld for taxes	0	$ 1	(1)
Foreign currency translation gain (loss)	4,457				4,457
Purchase and retirement of treasury stock (in shares)		(305)
Purchase and retirement of treasury stock	(3,003)	$ (3)	(1,275)	(1,725)
Net income	21,479			21,479
Ending balance (in shares) at Mar. 31, 2024		55,027
Ending balance at Mar. 31, 2024	800,396	$ 551	345,174	477,683	(23,012)
Beginning balance (in shares) at Sep. 30, 2024		54,553
Beginning balance at Sep. 30, 2024	804,571	$ 546	348,366	507,206	(51,547)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	2,597		2,597
Release of restricted stock, net of shares withheld for taxes (in shares)		718
Release of restricted stock, net of shares withheld for taxes	0	$ 7	(7)
Taxes paid related to net share settlement of equity awards	(3,971)		(3,971)
Foreign currency translation gain (loss)	(7,319)				(7,319)
Purchase and retirement of treasury stock (in shares)		(250)
Purchase and retirement of treasury stock	(3,000)	$ (3)	(1,202)	(1,795)
Net income	31,016			31,016
Ending balance (in shares) at Dec. 31, 2024		55,021
Ending balance at Dec. 31, 2024	823,894	$ 550	345,783	536,427	(58,866)
Beginning balance (in shares) at Sep. 30, 2024		54,553
Beginning balance at Sep. 30, 2024	804,571	$ 546	348,366	507,206	(51,547)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	56,406
Ending balance (in shares) at Mar. 31, 2025		55,014
Ending balance at Mar. 31, 2025	851,575	$ 550	347,796	561,211	(57,982)
Beginning balance (in shares) at Dec. 31, 2024		55,021
Beginning balance at Dec. 31, 2024	823,894	$ 550	345,783	536,427	(58,866)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	2,404		2,404
Release of restricted stock, net of shares withheld for taxes (in shares)		76
Release of restricted stock, net of shares withheld for taxes	0	$ 1	(1)
Foreign currency translation gain (loss)	884				884
Purchase and retirement of treasury stock (in shares)		(83)
Purchase and retirement of treasury stock	(997)	$ (1)	(390)	(606)
Net income	25,390			25,390
Ending balance (in shares) at Mar. 31, 2025		55,014
Ending balance at Mar. 31, 2025	$ 851,575	$ 550	$ 347,796	$ 561,211	$ (57,982)