Stock-Based Compensation - Stock Option Plans (Details) - Employee and Directors Stock Options - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Nov. 23, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Fair value assumptions
Fair Value (in dollars per share)	$ 15.02
Dividend Yield (as a percent)	2.00%
Risk-Free Interest Rate (as a percent)	1.22%
Expected Volatility (as a percent)	45.00%
Expected Life	5 years
Stock-based employee compensation expense		$ 245	$ 301	$ 537	$ 581
Remaining unrecognized compensation expense		$ 1,117		$ 1,117
Weighted average period for recognition				1 year
Activity under stock option plans, number of shares
Outstanding at beginning of the period (in shares)				702,576
Granted (in shares)				42,080
Exercised (in shares)				(6,533)
Canceled (in shares)				(22,478)
Outstanding at end of the period (in shares)		715,645		715,645
Vested or expected to vest (in shares)		650,351		650,351
Exercisable at end of period (in shares)		503,300		503,300
Outstanding at end of period, Aggregate Intrinsic Value		$ 6,035		$ 6,035
Vested or expected to vest, Aggregate Intrinsic Value		5,482		5,482
Exercisable at end of the period, Aggregate Intrinsic Value		$ 3,554		$ 3,554
Weighted Average Exercise Prices
Outstanding at beginning of the period (in dollars per share)				$ 34.68
Granted (in dollars per share)				44.07
Exercised (in dollars per share)				34.27
Canceled (in dollars per share)				42.32
Outstanding at end of period (in dollars per share)		$ 35.00		35.00
Vested or expected to vest (in dollars per share)		34.99		34.99
Exercisable at end of the period (in dollars per share)		$ 36.60		$ 36.60
Outstanding at end of the period, Weighted Average Remaining Contractual Life				6 years 6 months 29 days
Vested or expected to vest, Weighted Average Remaining Contractual Life				4 years 3 months 21 days
Exercisable at end of the period, Weighted Average Remaining Contractual Life				5 years 9 months 25 days