Fair Value Measurements (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Executive Savings Plan assets	$ 937	$ 766
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(806)	(644)
Business Combination, Contingent Consideration, Liability, Noncurrent	(4,181)
Fair Value, Net Asset (Liability)	(4,050)	(122)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0	11
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	4,074
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	(107)	(11)
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Executive Savings Plan assets	937	766
Financial and Nonfinancial Liabilities, Fair Value Disclosure	(806)	(644)
Fair Value, Net Asset (Liability)	(131)	(122)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Noncurrent	(4,181)
Fair Value, Net Asset (Liability)	$ (4,181)	$ 0