v3.25.4
Fair Value Measurements (Financial instruments level within the fair value hierarchy) (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Mar. 31, 2025
Assets:    
Fixed maturities - available for sale $ 2,501,436 $ 2,479,498
Preferred stock 8,075 22,136
Common stock 49,343 43,413
Derivatives 10,624 13,200
Total 21,500 2,558,247
Liabilities:    
Derivatives 411 777
Guaranteed residual values of TRAC leases 8,966 8,693
Liabilities from investment contracts 2,406,345 2,436,537
Market risk benefits 12,123 13,432
Total 2,569,478 22,902
Level 1 [Member]    
Assets:    
Preferred stock 8,075 22,136
Common stock 49,343 43,413
Derivatives 8,314 8,819
Total   74,368
Liabilities:    
Total 65,732  
Level 2 [Member]    
Assets:    
Fixed maturities - available for sale 2,501,436 2,479,498
Derivatives 2,310 4,381
Total   2,483,879
Liabilities:    
Derivatives 411 777
Total 2,503,746 777
Level 3 [Member]    
Assets:    
Total 21,089  
Liabilities:    
Guaranteed residual values of TRAC leases 8,966 8,693
Liabilities from investment contracts 2,406,345 2,436,537
Market risk benefits $ 12,123 13,432
Total   $ 22,125