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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Net of Tax |  |  |  |
Balance at beginning and end of period | $ (456,799) | $ 120,093 |  |
Other comprehensive income (loss) |  |  |  |
Unrealized holding gains (losses) arising during the period, net of tax | (584,856) | (138,435) | $ 178,761 |
Less: Reclassification adjustment for net gains (losses) on investments included in net income: |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses | (7,880) | 4,472 | 26,440 |
Net decrease (increase) in expected credit losses | 0 | 725 | (991) |
Net unrealized gains (losses) on investments | (576,976) | (143,632) | 153,312 |
Other adjustments to comprehensive income (loss), net | 84 | 0 | (75) |
Other comprehensive income (loss), net of tax | (576,892) | (143,632) | 153,237 |
Other Comprehensive Income (Loss) |  |  |  |
Before Tax |  |  |  |
Balance at beginning of period | 152,016 | 333,829 | 139,858 |
Other comprehensive income (loss) |  |  |  |
Unrealized holding gains (losses) arising during the period, before tax | (740,324) | (175,234) | 226,280 |
Less: Reclassification adjustment for net gains (losses) on investments included in net income |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses | (9,974) | 5,661 | 33,468 |
Net decrease (increase) in expected credit losses |  | 918 | (1,254) |
Net unrealized gains on investments | (730,350) | (181,813) | 194,066 |
Other adjustments to comprehensive income, net | 106 |  | (95) |
Other comprehensive income (loss) | (730,244) | (181,813) | 193,971 |
Balance at end of period | (578,228) | 152,016 | 333,829 |
Tax Effect |  |  |  |
Balance at beginning of period | 31,923 | 70,104 | 29,370 |
Other comprehensive income (loss) |  |  |  |
Unrealized holding gains (losses) arising during the period, tax | (155,468) | (36,799) | 47,519 |
Less: Reclassification adjustment for net gains (losses) on investments included in net income: |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses | (2,094) | 1,189 | 7,028 |
Net decrease (increase) in expected credit losses |  | 193 | (263) |
Net unrealized gains on investments | (153,374) | (38,181) | 40,754 |
Other adjustments to comprehensive income, net | 22 |  | (20) |
Other comprehensive income (loss) | (153,352) | (38,181) | 40,734 |
Balance at end of period | (121,429) | 31,923 | 70,104 |
Net of Tax |  |  |  |
Balance at beginning and end of period | (456,799) | 120,093 | 263,725 | $ 110,488
Other comprehensive income (loss) |  |  |  |
Unrealized holding gains (losses) arising during the period, net of tax | (584,856) | (138,435) | 178,761 |
Less: Reclassification adjustment for net gains (losses) on investments included in net income: |  |  |  |
Net realized gains (losses) on disposals and non-credit related impairment losses | (7,880) | 4,472 | 26,440 |
Net decrease (increase) in expected credit losses |  | 725 | (991) |
Net unrealized gains (losses) on investments | (576,976) | (143,632) | 153,312 |
Other adjustments to comprehensive income (loss), net | 84 |  | (75) |
Other comprehensive income (loss), net of tax | $ (576,892) | $ (143,632) | $ 153,237 |

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