CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Total
Beginning Balance at Sep. 30, 2019	$ 306	$ 292,408	$ 684,741	$ (43,974)	$ (107,259)	$ 826,222
Beginning Balance (in shares) at Sep. 30, 2019	30,597
Comprehensive income (loss):
Net earnings	$ 0	0	99,411	0	0	99,411
Translation adjustments, net of tax	0	0	0	3,172	0	3,172
Pension termination and net unrecognized actuarial loss, net of tax	0	0	0	37,145	0	37,145
Cash dividends declared	0	0	(8,323)	0	0	(8,323)
Stock compensation plans, net of tax	$ 0	1,274	0	0	125	1,399
Stock compensation plans, net of tax (in shares)	49
Ending Balance at Sep. 30, 2020	$ 306	293,682	775,829	(3,657)	(107,134)	959,026
Ending Balance (in shares) at Sep. 30, 2020	30,646
Comprehensive income (loss):
Net earnings	$ 0	0	63,496	0	0	63,496
Translation adjustments, net of tax	0	0	0	1,496	0	1,496
Cash dividends declared	0	0	(8,336)	0	0	(8,336)
Stock compensation plans, net of tax	$ 1	3,962	0	0	51	4,014
Stock compensation plans, net of tax (in shares)	20
Ending Balance at Sep. 30, 2021	$ 307	297,644	830,989	(2,161)	(107,083)	1,019,696
Ending Balance (in shares) at Sep. 30, 2021	30,666
Comprehensive income (loss):
Net earnings	$ 0	0	82,320	0	0	82,320
Net unrecognized actuarial loss - SERP	0	0	0	(727)	0	(727)
Translation adjustments, net of tax	0	0	0	(28,876)	0	(28,876)
Cash dividends declared	0	0	(8,287)	0	0	(8,287)
Purchases of common stock into treasury	0	0	0	0	(19,878)	(19,878)
Stock compensation plans, net of tax	$ 0	3,909	0	0	0	3,909
Stock compensation plans, net of tax (in shares)	42
Ending Balance at Sep. 30, 2022	$ 307	$ 301,553	$ 905,022	$ (31,764)	$ (126,961)	$ 1,048,157
Ending Balance (in shares) at Sep. 30, 2022	30,708