Earnings Per Share - Schedule of Earnings Per Share. Basic and Dilutive (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Numerator:
Income from continuing operations	$ 27,208	$ 43,817	$ 88,107	$ 102,932
Income (loss) from discontinued operations, net of tax	2	0	2	(77)
Net income	$ 27,210	$ 43,817	$ 88,109	$ 102,855
Denominator:
Basic weighted-average shares (in shares)	30,513	30,395	30,625	30,335
Dilutive effect of restricted stock awards (in shares)	414	458	384	309
Dilutive effect of stock options (in shares)	8	7	8	5
Dilutive weighted-average shares (in shares)	30,935	30,860	31,017	30,649
Basic income per share:
Continuing operations (in USD per share)	$ 0.89	$ 1.44	$ 2.88	$ 3.39
Discontinued operations (in USD per share)	0	0	0	0
Total (in USD per share)	0.89	1.44	2.88	3.39
Diluted income per share:
Continuing operations (in USD per share)	0.88	1.42	2.84	3.36
Discontinued operations (in USD per share)	0	0	0	0
Total (in USD per share)	$ 0.88	$ 1.42	$ 2.84	$ 3.36