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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Other comprehensive income (loss): |  |
Other comprehensive loss, before tax | $ (238,903) | $ (69,404)
Other comprehensive income (loss): |  |
Other comprehensive income, tax effect | 35,897 | 10,201
Net of Tax |  |
Balance, beginning of period | 4,236,114 |
Other comprehensive income (loss): |  |
Total other comprehensive loss | (203,006) | (59,203)
Balance, end of period | 4,215,068 | 3,920,937
Accumulated Other Comprehensive Income (Loss) |  |
Before Tax |  |
AOCI before tax, beginning of period | 65,280 | 168,324
Other comprehensive income (loss): |  |
AOCI before tax, end of period | (173,623) | 98,920
Tax Effect |  |
AOCI tax effect, beginning of period | (14,573) | (30,050)
Other comprehensive income (loss): |  |
AOCI tax effect, end of period | 21,324 | (19,849)
Net of Tax |  |
Balance, beginning of period | 50,707 | 138,274
Other comprehensive income (loss): |  |
Total other comprehensive loss | (203,006) | (59,203)
Balance, end of period | (152,299) | 79,071
Accumulated Net Investment Gains (Losses) On Investments |  |
Other comprehensive income (loss): |  |
Unrealized holding losses arising during the period, before tax | (246,255) | (68,763)
Less: Reclassification adjustment for losses (gains) included in net income, before tax | 7,352 | (641)
Other comprehensive loss, before tax | (238,903) | (69,404)
Other comprehensive income (loss): |  |
Unrealized holding losses arising during the period, tax effect | 34,830 | 10,201
Less: Reclassification adjustment for losses (gains) included in net income, tax effect | 1,067 | 0
Other comprehensive income, tax effect | 35,897 | 10,201
Other comprehensive income (loss): |  |
Unrealized holding losses arising during the period, net of tax | (211,425) | (58,562)
Less: Reclassification adjustment for losses (gains) included in net income, net of tax | 8,419 | (641)
Total other comprehensive loss | $ (203,006) | $ (59,203)

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