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Receivable From and Payable to Brokers, Dealers and Clearing Organizations
3 Months Ended
Mar. 31, 2021
Brokers and Dealers [Abstract]  
Receivable From and Payable to Brokers, Dealers and Clearing Organizations Receivable from and payable to brokers, dealers and clearing organizations
(Expressed in thousands)  
 As of
 March 31, 2021December 31, 2020
Receivable from brokers, dealers and clearing organizations consists of:
Other744 15,634 
Total$233,915 $203,494 
Payable to brokers, dealers and clearing organizations consists of:
Securities loaned$257,342 $249,499 
Payable to brokers1,336 4,102 
Securities failed to receive38,100 6,218 
Other (1)
124,635 92 
Total$421,413 $259,911