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v3.23.2

Summary of Significant Accounting Policies (Reconciliation of Impact of Adopting ASU 2018-12 on OCI, Prior Period) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Accounting Policies [Abstract] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | $ (130,983) | $ (301,835) | $ 26,762 | $ (762,021)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | $ (130,983) | (301,835) | $ 26,762 | (762,021)
Effect of Modified Retrospective Application Accounting Standards Update 2018-12 |  |  |  |
Accounting Policies [Abstract] |  |  |  |
Reverse benefit included in change in net unrealized gains (losses) on available-for-sale-investments, net of taxes, related to reversal of previously recognized reserve deficiency adjustment |  | 0 |  | (44,682)
Change in discount rate for life and annuity benefits, net of taxes |  | 63,198 |  | 123,891
Other Comprehensive Income (Loss), Net of Tax |  | 63,198 |  | 79,209
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reverse benefit included in change in net unrealized gains (losses) on available-for-sale-investments, net of taxes, related to reversal of previously recognized reserve deficiency adjustment |  | 0 |  | (44,682)
Change in discount rate for life and annuity benefits, net of taxes |  | 63,198 |  | 123,891
Other Comprehensive Income (Loss), Net of Tax |  | $ 63,198 |  | $ 79,209

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