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Fair Value Measurements (Financial instruments level within the fair value hierarchy) (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | ---
Assets: |  |
Fixed maturities - available for sale | $ 2,442,504 | $ 2,709,037
Preferred stock | 21,260 | 21,982
Common stock | 45,014 | 39,375
Derivatives | 18,930 | 9,606
Total | 2,527,708 | 2,780,000
Level 1 [Member] |  |
Assets: |  |
Fixed maturities - available for sale | 0 | 251,832
Preferred stock | 21,260 | 21,982
Common stock | 45,014 | 39,735
Derivatives | 10,538 | 4,295
Total | 76,812 | 317,844
Level 2 [Member] |  |
Assets: |  |
Fixed maturities - available for sale | 2,442,446 | 2,457,146
Preferred stock | 0 |
Common stock | 0 |
Derivatives | 8,392 | 5,311
Total | 2,450,838 | 2,462,457
Level 3 [Member] |  |
Assets: |  |
Fixed maturities - available for sale | 58 | 59
Preferred stock | 0 |
Common stock | 0 |
Derivatives | 0 |
Total | $ 58 | $ 59

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