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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Dec. 01, 2022	Sep. 30, 2020	May 20, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Capital Shares Reserved for Future Issuance	619,735
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	1,500,000					1,000,000.0
Treasury Stock, Shares, Acquired	224,013	511,600
Treasury Stock Acquired, Average Cost Per Share	$ 31.06	$ 32.02
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	105,755	157,167
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	32,158	45,198
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(266)
Options exercised, shares	3,000	9,000
Stock Repurchase Program, Authorized Amount				$ 40,000
Common Stock, Shares, Issued	22,049,529	22,049,529	22,049,529		22,049,529
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(266)	0	(13,996)
Share-based Payment Arrangement, Expense	$ 23	$ 137	$ 145
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	13,639	16,757	38,936
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(13,373)	(3,118)	(8,183)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	0	13,639	16,757
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 461	$ 150	$ 308
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 386	$ 386	376
Performance Based Phantom Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(13,583)
Shares, Issued	129,189
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	105,755
Shares, Outstanding	325,813	315,961,000
Phantom Share Units, Employee PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 3,963	$ 3,251	$ 2,986
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	3,000	9,000
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Shares Authorized	3,000,000.0

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