Quarterly report pursuant to Section 13 or 15(d)

CASH AND CASH EQUIVALENTS - Schedule of collateralized securities received under reverse repurchase agreements (Details)

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CASH AND CASH EQUIVALENTS - Schedule of collateralized securities received under reverse repurchase agreements (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days $ 973,443 $ 872,550
30-90 days 56,728 142
Total contractual maturity 1,030,171 872,692
Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days 319,775 278,685
30-90 days 24 0
Total contractual maturity $ 319,799 $ 278,685
Non-U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 13.77% 3.09%
Up to 30 days $ 2,409 $ 9,956
30-90 days 24 0
Total contractual maturity 2,433 9,956
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days 392,091 641,550
30-90 days 18,846 142
Total contractual maturity $ 410,937 $ 641,692
Corporate debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 12.68% 11.92%
Up to 30 days $ 6,290 $ 7,261
30-90 days 0 0
Total contractual maturity 6,290 7,261
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days 1,102 712
30-90 days 0 0
Total contractual maturity $ 1,102 $ 712
Corporate equity | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 2.14% 10.26%
Up to 30 days $ 307,522 $ 251,516
30-90 days 0 0
Total contractual maturity $ 307,522 251,516
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days   7,396
30-90 days   0
Total contractual maturity   $ 7,396
U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 16.50% 0.04%
Up to 30 days $ 3,554 $ 9,952
30-90 days 0 0
Total contractual maturity $ 3,554 $ 9,952