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Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Net realized and unrealized investment gains (losses) | $ 177 | $ 7,721 | $ 15,353 | $ (24,296)
Net investment income earned | 93,032 | 68,185 | 246,479 | 158,596
Loss and loss expense incurred | 505,269 | 447,802 | 1,340,293 | 1,252,075
Other insurance expenses | 94,759 | 89,530 | 278,531 | 269,477
Income before federal income tax | 92,636 | 85,257 | 381,466 | 143,947
Total federal income tax expense | (18,931) | (15,382) | (76,608) | (24,653)
Net income | 73,705 | 69,875 | 304,858 | 119,294
Reclassification out of AOCI |  |  |  |
Net income | 579 | (2,064) | 4,346 | 15,320
Pension Plan [Member] | Reclassification out of AOCI |  |  |  |
Loss and loss expense incurred | 159 | 162 | 478 | 486
Other insurance expenses | 534 | 592 | 1,601 | 1,775
Income before federal income tax | 693 | 754 | 2,079 | 2,261
Total federal income tax expense | (145) | (158) | (436) | (474)
Net income | 548 | 596 | 1,643 | 1,787
Held-to-maturity Securities [Member] | Reclassification out of AOCI |  |  |  |
Net realized and unrealized investment gains (losses) | (1) | 4 | (1) | 5
Net investment income earned | 2 | (5) | (3) | (12)
Income before federal income tax | 1 | (1) | (4) | (7)
Total federal income tax expense | 0 | 1 | 1 | 2
Net income | 1 | 0 | (3) | (5)
Available for sale securities, excluding credit losses [Member] | Reclassification out of AOCI |  |  |  |
Net realized and unrealized investment gains (losses) | (1,296) | (515) | (634) | 9,126
Income before federal income tax | (1,296) | (515) | (634) | 9,126
Total federal income tax expense | 272 | 109 | 133 | (1,916)
Net income | (1,024) | (406) | (501) | 7,210
Available for sale securities, including credit losses | Reclassification out of AOCI |  |  |  |
Net realized and unrealized investment gains (losses) | 1,334 | (2,853) | 4,059 | 8,010
Income before federal income tax | 1,334 | (2,853) | 4,059 | 8,010
Total federal income tax expense | (280) | 599 | (852) | (1,682)
Net income | $ 1,054 | $ (2,254) | $ 3,207 | $ 6,328

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