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 (loss)	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, 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	95,503
Other comprehensive income (loss)	16,272
Balance at Mar. 31, 2021	134,833	$ 1,127	9,525	212,612	(88,431)
Balance (in shares) at Mar. 31, 2021		112,679
Balance at Dec. 31, 2020	98,866	$ 1,125	4,556	174,300	(81,115)
Balance (in shares) at Dec. 31, 2020		112,538
Increase (Decrease) in Stockholders' Equity
Net earnings	38,312			38,312
Other comprehensive income (loss)	(7,316)				(7,316)
Share-based compensation	2,648		2,648
Stock issued for equity awards	2,323	$ 2	2,321
Stock issued for equity awards (in shares)		141
Balance at Mar. 31, 2021	134,833	$ 1,127	9,525	212,612	(88,431)
Balance (in shares) at Mar. 31, 2021		112,679
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 (loss)	(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
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	$ 115,646
Other comprehensive income (loss)	(6,827)
Balance at Mar. 31, 2022	$ 271,866	$ 1,069		372,265	(101,468)
Balance (in shares) at Mar. 31, 2022	106,930	106,930
Balance at Dec. 31, 2021	$ 281,021	$ 1,100		378,313	(98,392)
Balance (in shares) at Dec. 31, 2021		109,977
Increase (Decrease) in Stockholders' Equity
Net earnings	46,808			46,808
Other comprehensive income (loss)	(3,076)				(3,076)
Share-based compensation	2,032		2,032
Stock issued for equity awards	424	$ 1	423
Stock issued for equity awards (in shares)		111
Employee withholding taxes paid related to net share settlement	(15)		(15)
Employee withholding taxes paid related to net share settlement (in shares)		(1)
Repurchases and cancellations of common stock	(55,328)	$ (32)	$ (2,440)	(52,856)
Repurchases and cancellations of common stock (in shares)		(3,157)
Balance at Mar. 31, 2022	$ 271,866	$ 1,069		$ 372,265	$ (101,468)
Balance (in shares) at Mar. 31, 2022	106,930	106,930