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Schedule II Condensed Financial Information of Registrant - Condensed Statements of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net investment income |  |  |  |  |  |  |  |  |  |  |  |  | $ 357,596 | $ 365,064 | $ 376,507
Net investment gains (losses) |  |  |  |  |  |  |  |  |  |  |  |  | (2,289) | 153,340 | (12,543)
Total revenues | $ 352,344 | $ 337,080 | $ 314,459 | $ 306,558 | $ 331,376 | $ 334,418 | $ 451,478 | $ 313,213 | $ 278,535 | $ 311,318 | $ 306,257 | $ 295,489 | 1,310,441 | 1,430,485 | 1,191,599
Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 15,215 | 15,577 | 13,001
Total benefits, losses and expenses |  |  |  |  |  |  |  |  |  |  |  |  | 1,150,858 | 1,194,036 | 1,172,062
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  |  | 26,268 | 52,006 | 1,194
Net income | $ 47,791 | $ 36,474 | $ 30,578 | $ 18,472 | $ 33,001 | $ 25,454 | $ 93,822 | $ 32,166 | $ (20,257) | $ 12,528 | $ 5,917 | $ 20,155 | 133,315 | 184,443 | 18,343
Parent company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net investment income |  |  |  |  |  |  |  |  |  |  |  |  | (174) | (135) | 100
Net investment gains (losses) |  |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0
Total revenues |  |  |  |  |  |  |  |  |  |  |  |  | (174) | (135) | 100
Expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 14,771 | 14,272 | 11,892
Other |  |  |  |  |  |  |  |  |  |  |  |  | 5,750 | 12,632 | 10,898
Total benefits, losses and expenses |  |  |  |  |  |  |  |  |  |  |  |  | 20,521 | 26,904 | 22,790
Loss before income tax benefit and equity in net earnings of subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  | (20,695) | (27,039) | (22,690)
Income tax benefit |  |  |  |  |  |  |  |  |  |  |  |  | (5,307) | (6,029) | (4,723)
Loss before equity in net earnings of subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  | (15,388) | (21,010) | (17,967)
Equity in net earnings of subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  | 148,703 | 205,453 | 36,310
Net income |  |  |  |  |  |  |  |  |  |  |  |  | $ 133,315 | $ 184,443 | $ 18,343

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