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Furniture, equipment and leasehold improvements (Tables)
12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Schedule of Office Facilities
(Expressed in thousands)  
 For the Years Ended December 31,
 20222021
Furniture, fixtures and equipment$76,070 $63,334 
Leasehold improvements58,423 57,487 
Total134,493 120,821 
Less accumulated depreciation(97,751)(92,785)
Total$36,742 $28,036