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 $ 939,179 $ 840,082
30-90 days 56,728 142
Total contractual maturity 995,907 840,224
Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days 6,863 19,947
30-90 days 25 0
Total contractual maturity $ 6,888 $ 19,947
Non-U.S. sovereign debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 15.21% 3.09%
Up to 30 days $ 1,393 $ 9,786
30-90 days 25 0
Total contractual maturity 1,418 9,786
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days 358,929 609,405
30-90 days 18,846 142
Total contractual maturity $ 377,775 $ 609,547
Corporate debt | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 1.11% 11.90%
Up to 30 days $ 1,754 $ 56
30-90 days 0 0
Total contractual maturity $ 1,754 56
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Up to 30 days   388
30-90 days   0
Total contractual maturity   $ 388
Corporate equity | Cash and cash equivalents    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Average interest rate 17.70% 12.11%
Up to 30 days $ 162 $ 153
30-90 days 0 0
Total contractual maturity $ 162 153
US 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
US 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