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)

v3.24.3
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
 6 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
times
Mar. 31, 2024
USD ($)
times
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 3,601,118 $ 3,688,620
Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 18,767 $ 20,442
Corporate debt | Discounted cash flow    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Estimated number of years 3 months 3 months
Corporate debt | Discounted cash flow | Level 3    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Trading securities $ 372 $ 292
Corporate debt | 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 3 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 $ 18,262 $ 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 26.8 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 $ 133 $ 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