Stock-Based Compensation - Stock Option Plans (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Nov. 21, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair value assumptions
Fair Value (in dollars per share)	$ 18.48
Dividend Yield (as a percent)	1.81%
Risk-Free Interest Rate (as a percent)	4.44%
Expected Volatility (as a percent)	43.63%
Expected Life	5 years
Employee Stock Option
Fair value assumptions
Stock-based employee compensation expense		$ 154	$ 149	$ 459	$ 500
Remaining unrecognized compensation expense		$ 945		$ 945
Weighted average period for recognition				1 year 6 months 14 days
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)				498,548
Granted (in shares)				42,725
Outstanding at end of the period (in shares)		541,273		541,273
Vested or expected to vest (in shares)		517,726		517,726
Exercisable at end of period (in shares)		463,917		463,917
Outstanding at end of period, Aggregate Intrinsic Value		$ 12,763		$ 12,763
Vested or expected to vest, Aggregate Intrinsic Value		12,193		12,193
Exercisable at end of the period, Aggregate Intrinsic Value		$ 11,936		$ 11,936
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share)				$ 33.96
Granted (in dollars per share)				48.63
Exercised (in dollars per share)				0.00
Surrendered (in dollars per share)				0.00
Outstanding at end of period (in dollars per share)		$ 35.12		35.12
Vested or expected to vest (in dollars per share)		35.15		35.15
Exercisable at end of the period (in dollars per share)		$ 32.97		$ 32.97
Outstanding at end of the period, Weighted Average Remaining Contractual Life				5 years 9 months 25 days
Vested or expected to vest, Weighted Average Remaining Contractual Life				5 years 14 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life				5 years 3 months 25 days