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Property And Equipment, Net (Tables)
6 Months Ended
Mar. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of Property, Plant and Equipment
Table 15: Details of Property and Equipment, Net
March 31, 2022September 30, 2021
(in thousands)
Land$— $1,738 
Building and improvements— 11,981 
Office furniture and equipment247,100 254,102 
Leasehold improvements88,236 79,938 
Property and equipment, at cost335,336 347,759 
Accumulated depreciation(277,391)(285,132)
Property and equipment, net$57,945 $62,627