Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of present securities assets at fair value (Details)

v3.25.0.1
TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of present securities assets at fair value (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Mar. 31, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 3,415,517 $ 3,688,620
Fair value of equity securities 418,614 216,621
Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 3,415,517 3,688,620
Fair value of equity securities 418,614 216,621
Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 2,177,892 1,909,950
Fair value of equity securities 219,146 75,550
Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,218,225 1,758,228
Fair value of equity securities 199,468 141,071
Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 19,400 20,442
Fair value of equity securities 0 0
Non-U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 2,420,650 2,409,126
Fair value of equity securities $ 217,102 $ 27,016
Non-U.S. sovereign debt | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities, weighted average interest rate 10.81% 11.61%
Trading securities $ 2,420,650 $ 2,409,126
Total available-for-sale securities, weighted average interest rate 8.86% 10.48%
Fair value of equity securities $ 217,102 $ 27,016
Non-U.S. sovereign debt | Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 1,528,011 1,592,380
Fair value of equity securities 106,305 12,378
Non-U.S. sovereign debt | Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 892,639 816,746
Fair value of equity securities 110,797 14,638
Non-U.S. sovereign debt | Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Fair value of equity securities 0 0
Corporate debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 793,240 1,108,870
Fair value of equity securities $ 180,272 $ 173,568
Corporate debt | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities, weighted average interest rate 14.23% 14.83%
Trading securities $ 793,240 $ 1,108,870
Total available-for-sale securities, weighted average interest rate 14.07% 15.53%
Fair value of equity securities $ 180,272 $ 173,568
Corporate debt | Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 473,308 171,218
Fair value of equity securities 91,601 47,135
Corporate debt | Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 319,074 937,360
Fair value of equity securities 88,671 126,433
Corporate debt | Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 858 292
Fair value of equity securities 0 0
Corporate equity    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 118,823 $ 126,103
Corporate equity | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities, weighted average interest rate
Trading securities $ 118,823 $ 126,103
Corporate equity | Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 96,160 102,134
Corporate equity | Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 4,121 3,819
Corporate equity | Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 18,542 20,150
U.S. sovereign debt    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 73,363 43,173
Fair value of equity securities $ 21,240 $ 16,037
U.S. sovereign debt | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities, weighted average interest rate 4.35% 4.98%
Trading securities $ 73,363 $ 43,173
Total available-for-sale securities, weighted average interest rate 3.41% 3.54%
Fair value of equity securities $ 21,240 $ 16,037
U.S. sovereign debt | Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 73,363 43,173
Fair value of equity securities 21,240 16,037
U.S. sovereign debt | Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Fair value of equity securities 0 0
U.S. sovereign debt | Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 0 0
Fair value of equity securities 0 0
Exchange traded notes    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 9,441 $ 1,348
Exchange traded notes | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities, weighted average interest rate
Trading securities $ 9,441 $ 1,348
Exchange traded notes | Level 1 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 7,050 1,045
Exchange traded notes | Level 2 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities 2,391 303
Exchange traded notes | Level 3 | Fair value, recurring    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 0 $ 0