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v3.23.3

Accounting Pronouncements (Effects of Adoption of ASU 2018-12 Statement Of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Statements Adjusted [Abstract] |  |  |  |
Benefits and losses | $ 42,553 | $ 39,512 | $ 87,897 | $ 79,269
Amortization of deferred policy acquisition costs | 6,826 | 6,972 | 14,871 | 14,644
Pretax earnings | 358,048 | 461,490 | 696,743 | 906,889
Net earnings available to common shareholders | 273,508 | 349,866 | 530,346 | 688,211
Common Stock [Member] |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Net earnings available to common shareholders | $ 0 | $ 0 | $ 0 | $ 0
Basic and diluted earnings per share Common Stock | $ 1.36 | $ 2.23 | $ 2.63 | $ 4.41
Nonvoting Common Stock [Member] |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Net earnings available to common shareholders | $ 0 | $ 0 | $ 0 | $ 0
Basic and diluted earnings per share Common Stock | $ 1.40 | $ 1.73 | $ 2.71 | $ 3.41
Operating Segments [Member] | Life Insurance [Member] |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Benefits and losses | $ 38,324 | $ 33,437 | $ 79,210 | $ 68,815
Amortization of deferred policy acquisition costs | 6,826 | 6,972 | 14,871 | 14,644
Pretax earnings | 5,488 | (417) | 6,724 | 5,379
Net earnings available to common shareholders | 4,624 | $ (613) | 5,344 | $ 4,800
Previously Reported |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Benefits and losses | 37,363 |  | 81,463 |
Pretax earnings | 463,639 |  | 904,695 |
Net earnings available to common shareholders | $ 352,015 |  | $ 686,017 |
Basic and diluted earnings per share Common Stock | $ 2.25 |  | $ 4.4 |
Previously Reported | Nonvoting Common Stock [Member] |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Basic and diluted earnings per share Common Stock | $ 1.75 |  | $ 3.4 |
Effect of adoption |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Benefits and losses | $ 2,149 |  | $ (2,194) |
Pretax earnings | (2,149) |  | 2,194 |
Net earnings available to common shareholders | $ (2,149) |  | $ 2,194 |
Basic and diluted earnings per share Common Stock | $ (0.02) |  | $ 0.01 |
Effect of adoption | Nonvoting Common Stock [Member] |  |  |  |
Statements Adjusted [Abstract] |  |  |  |
Basic and diluted earnings per share Common Stock | $ (0.02) |  | $ 0.01 |

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