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
Transfer of equity consideration for acquisition (in shares)		10
Transfer of equity consideration for acquisition	99		99
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 (loss)	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 (loss)	16,778			16,778
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, 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]
Net income (loss)	28,210
Ending balance (in shares) at Jun. 30, 2023		55,185
Ending balance at Jun. 30, 2023	739,042	$ 552	344,857	422,549	(28,916)
Beginning balance (in shares) at Dec. 31, 2022		55,848
Beginning balance at Dec. 31, 2022	705,335	$ 559	343,012	414,929	(53,165)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	1,855		1,855
Release of restricted stock, net of shares withheld for taxes (in shares)		132
Release of restricted stock, net of shares withheld for taxes	2	$ 2
Taxes paid related to net share settlement of equity awards (in shares)		(1)
Taxes paid related to net share settlement of equity awards	(11)		(11)
Foreign currency translation gain (loss)	16,148				16,148
Purchase and retirement of treasury stock (in shares)		(448)
Purchase and retirement of treasury stock	(3,951)	$ (5)	(1,768)	(2,178)
Net income (loss)	(6,790)			(6,790)
Ending balance (in shares) at Mar. 31, 2023		55,531
Ending balance at Mar. 31, 2023	712,588	$ 556	343,088	405,961	(37,017)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	3,135		3,135
Foreign currency translation gain (loss)	8,101				8,101
Purchase and retirement of treasury stock (in shares)		(346)
Purchase and retirement of treasury stock	(3,004)	$ (4)	(1,366)	(1,634)
Net income (loss)	18,222			18,222
Ending balance (in shares) at Jun. 30, 2023		55,185
Ending balance at Jun. 30, 2023	739,042	$ 552	344,857	422,549	(28,916)
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]
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 (loss)	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 (loss)	67,899
Ending balance (in shares) at Jun. 30, 2024		54,742
Ending balance at Jun. 30, 2024	801,455	$ 548	347,082	493,830	(40,005)
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 (loss)	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)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock compensation	3,101		3,101
Foreign currency translation gain (loss)	(16,993)				(16,993)
Purchase and retirement of treasury stock (in shares)		(285)
Purchase and retirement of treasury stock	(2,999)	$ (3)	(1,193)	(1,803)
Net income (loss)	17,950			17,950
Ending balance (in shares) at Jun. 30, 2024		54,742
Ending balance at Jun. 30, 2024	$ 801,455	$ 548	$ 347,082	$ 493,830	$ (40,005)