Condensed Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Earnings	Accumulated Other Comprehensive Loss
Balance at Sep. 30, 2020	$ 15,443	$ 1,124	$ 1,913	$ 117,109	$ (104,703)
Balance (in shares) at Sep. 30, 2020		112,405
Increase (Decrease) in Stockholders' Equity
Net earnings	57,191			57,191
Other comprehensive income	23,588				23,588
Share-based compensation	2,893		2,893
Stock issued for equity awards		$ 2	(2)
Stock issued for equity awards (in shares)		158
Employee withholding taxes paid related to net share settlement	(249)	$ (1)	(248)
Employee withholding taxes paid related to net share settlement (in shares)		(25)
Balance at Dec. 31, 2020	98,866	$ 1,125	4,556	174,300	(81,115)
Balance (in shares) at Dec. 31, 2020		112,538
Balance at Sep. 30, 2021	$ 280,741	$ 1,129	17,286	356,967	(94,641)
Balance (in shares) at Sep. 30, 2021	112,913	112,913
Increase (Decrease) in Stockholders' Equity
Net earnings	$ 68,838			68,838
Other comprehensive income	(3,751)				(3,751)
Share-based compensation	3,958		3,958
Stock issued for equity awards	7,372	$ 8	7,364
Stock issued for equity awards (in shares)		795
Employee withholding taxes paid related to net share settlement	(1,137)	$ (1)	(1,136)
Employee withholding taxes paid related to net share settlement (in shares)		(56)
Repurchases and cancellations of common stock	(75,000)	$ (36)	$ (27,472)	(47,492)
Repurchases and cancellations of common stock (in shares)		(3,675)
Balance at Dec. 31, 2021	$ 281,021	$ 1,100		$ 378,313	$ (98,392)
Balance (in shares) at Dec. 31, 2021	109,977	109,977