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Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Net realized and unrealized investment (losses) gains | $ (2,183) | $ (4,787) | $ 15,295 | $ (16,988)
Net investment income | (55,826) | (52,443) | (164,949) | (141,227)
Loss and loss expense incurred | 398,675 | 379,199 | 1,166,238 | 1,130,468
Other insurance expenses | 90,234 | 80,108 | 261,975 | 244,342
Income before federal income tax | 71,178 | 67,130 | 235,097 | 159,586
Total federal income tax expense | (15,028) | (11,695) | (45,333) | (26,407)
Net income | 56,150 | 55,435 | 189,764 | 133,179
Reclassification out of AOCI |  |  |  |
Net income | 2,752 | 8,977 | 1,899 | 15,662
Pension Plan [Member] | Reclassification out of AOCI |  |  |  |
Loss and loss expense incurred | 146 | 112 | 436 | 337
Other insurance expenses | 519 | 420 | 1,557 | 1,258
Income before federal income tax | 665 | 532 | 1,993 | 1,595
Total federal income tax expense | (140) | (112) | (419) | (335)
Net income | 525 | 420 | 1,574 | 1,260
Held-to-maturity Securities [Member] | Reclassification out of AOCI |  |  |  |
Net realized and unrealized investment (losses) gains | (3) | 11 | (12) | 5
Net investment income | 0 | (19) | (21) | (33)
Income before federal income tax | (3) | (8) | (33) | (28)
Total federal income tax expense | 1 | 2 | 7 | 6
Net income | (2) | (6) | (26) | (22)
Available-for-sale Securities [Member] | Reclassification out of AOCI |  |  |  |
Net realized and unrealized investment (losses) gains | 2,821 | 10,839 | 444 | 18,258
Income before federal income tax | 2,821 | 10,839 | 444 | 18,258
Total federal income tax expense | (592) | (2,276) | (93) | (3,834)
Net income | $ 2,229 | $ 8,563 | $ 351 | $ 14,424

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