Quarterly report pursuant to Section 13 or 15(d)

TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of valuation techniques and significant level 3 inputs used in the valuation (Details)

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TRADING AND AVAILABLE FOR SALE SECURITIES AT FAIR VALUE - Schedule of valuation techniques and significant level 3 inputs used in the valuation (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2024
USD ($)
times
Mar. 31, 2024
USD ($)
times
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 3,393,936 $ 3,688,620
Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 18,649 $ 20,442
Corporate Debt, 3 Months | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated number of years 3 months 3 months
Corporate Debt, 3 Months | Discounted cash flow | Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 217 $ 292
Corporate Debt, 3 Months | Discount rate | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Discount rate 0.740 0.740
Corporate equity | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated number of years 4 years 6 months 4 years 6 months
Corporate equity | Discounted cash flow | Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 18,296 $ 20,007
Corporate equity | Discount rate | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Discount rate 0.130 0.130
Corporate equity | Termination multiplier | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Discount rate | times 27 27
Corporate equity | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated number of years 9 years 9 years
Corporate equity | Discounted cash flow | Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 136 $ 143
Corporate equity | Discount rate | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Discount rate 0.588 0.588