Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Property, Plant and Equipment [Line Items]
Carrying Amount	$ 284,867	$ 267,509
Accumulated Depreciation	(231,056)	(210,523)
Net Book Value	53,811	56,986
Depreciation	19,400	19,600	$ 21,000
Land
Property, Plant and Equipment [Line Items]
Carrying Amount	4	4
Accumulated Depreciation	0	0
Net Book Value	4	4
Buildings and improvements
Property, Plant and Equipment [Line Items]
Carrying Amount	113,015	105,137
Accumulated Depreciation	(85,521)	(75,445)
Net Book Value	27,494	29,692
Furniture and equipment
Property, Plant and Equipment [Line Items]
Carrying Amount	137,828	127,793
Accumulated Depreciation	(111,944)	(101,888)
Net Book Value	25,884	25,905
Software
Property, Plant and Equipment [Line Items]
Carrying Amount	33,981	33,729
Accumulated Depreciation	(33,591)	(33,190)
Net Book Value	390	539
Construction in progress
Property, Plant and Equipment [Line Items]
Carrying Amount	39	846
Accumulated Depreciation	0	0
Net Book Value	$ 39	$ 846