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, 2022		56,425
Beginning balance at Sep. 30, 2022	$ 692,231	$ 564	$ 345,330	$ 402,006	$ (55,669)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	1,886		1,886
Release of restricted stock, net of shares withheld for taxes (in shares)		235
Release of restricted stock, net of shares withheld for taxes	2	$ 2
Taxes paid related to net share settlement of equity awards	(1,138)		(1,138)
Foreign currency translation gain	2,504				2,504
Purchase and retirement of treasury stock (in shares)		(822)
Purchase and retirement of treasury stock	(7,027)	$ (7)	(3,165)	(3,855)
Net income	16,778			16,778
Transfer of equity consideration for acquisition (in shares)		10
Transfer of equity consideration for acquisition	99		99
Ending balance (in shares) at Dec. 31, 2022		55,848
Ending balance at Dec. 31, 2022	705,335	$ 559	343,012	414,929	(53,165)
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	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)