Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect Period of Adoption Adjustment	Common Stock	Common Stock Cumulative Effect Period of Adoption Adjustment	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect Period of Adoption Adjustment	Accumulated Earnings	Accumulated Earnings Cumulative Effect Period of Adoption Adjustment	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Cumulative Effect Period of Adoption Adjustment
Balance at Sep. 30, 2019	$ (60,323)	$ 76	$ 1,167				$ 55,797	$ 76	$ (117,287)
Balance (in shares) at Sep. 30, 2019			116,725
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201602Member		us-gaap:AccountingStandardsUpdate201602Member		us-gaap:AccountingStandardsUpdate201602Member		us-gaap:AccountingStandardsUpdate201602Member		us-gaap:AccountingStandardsUpdate201602Member
Increase (Decrease) in Stockholders' Equity
Net earnings	113,245						113,245
Other comprehensive income, net of tax	12,584								12,584
Repurchases of common stock	$ (61,357)		$ (46)		$ (9,302)		(52,009)
Repurchases of common stock (in shares)	(4,702)		(4,702)
Share-based compensation	$ 8,425				8,425
Stock issued for equity awards	3,135		$ 4		3,131
Stock issued for equity awards (in shares)			419
Employee withholding taxes paid related to net share settlement	(342)		$ (1)		(341)
Employee withholding taxes paid related to net share settlement (in shares)			(37)
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	239,858						239,858
Other comprehensive income, net of tax	10,062								10,062
Share-based compensation	11,656				11,656
Stock issued for equity awards	4,768		$ 6		4,762
Stock issued for equity awards (in shares)			579
Employee withholding taxes paid related to net share settlement	(1,046)		$ (1)		(1,045)
Employee withholding taxes paid related to net share settlement (in shares)			(71)
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	$ 183,553						183,553
Other comprehensive income, net of tax	(57,206)								(57,206)
Repurchases of common stock	$ (130,328)		$ (68)		(29,912)		(100,348)
Repurchases of common stock (in shares)	(6,832)		(6,833)
Share-based compensation	$ 9,944				9,944
Stock issued for equity awards	8,112		$ 10		8,102
Stock issued for equity awards (in shares)			949
Employee withholding taxes paid related to net share settlement	(1,180)		$ (1)		(1,179)
Employee withholding taxes paid related to net share settlement (in shares)			(59)
Balance at Sep. 30, 2022	$ 293,636		$ 1,070		$ 4,241		$ 440,172		$ (151,847)
Balance (in shares) at Sep. 30, 2022	106,970		106,970