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Property And Equipment, Net (Tables)
12 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Schedule of property, plant and equipment
Table 17: Details of Property and Equipment, Net
As of September 30,
20212020
(in thousands)
Land$1,738 $1,738 
Building and improvements11,981 11,846 
Office furniture and equipment254,102 239,057 
Leasehold improvements79,938 84,063 
Property and equipment, at cost347,759 336,704 
Accumulated depreciation(285,132)(269,983)
Property and equipment, net$62,627 $66,721