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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
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, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Net income | $ 161,184 | $ 173,438 | $ 166,730 | $ 170,957 | $ 139,779 | $ 142,797 | $ 208,949 | $ 114,486 | $ 672,309 | $ 606,011 | $ 121,088
Unrealized gains (losses) on investments: |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains (losses) arising during the period |  |  |  |  |  |  |  |  | 180,441 | (97,356) | 31,903
Less: Reclassification adjustment for net gains (losses) included in net income |  |  |  |  |  |  |  |  | 8,897 | (10,270) | (2,642)
Net unrealized gains (losses) on investments, net of tax |  |  |  |  |  |  |  |  | 171,544 | (87,086) | 34,545
Foreign currency translation adjustments: |  |  |  |  |  |  |  |  |  |  |
Unrealized foreign currency translation adjustments |  |  |  |  |  |  |  |  | 0 | 5 | 150
Less: Reclassification adjustment for liquidation of foreign subsidiary and other adjustments included in net income |  |  |  |  |  |  |  |  | 3 | 1 | (721)
Net foreign currency translation adjustments |  |  |  |  |  |  |  |  | (3) | 4 | 871
Net actuarial gains (losses) |  |  |  |  |  |  |  |  | (133) | 129 | 64
OCI, net of tax |  |  |  |  |  |  |  |  | 171,408 | (86,953) | 35,480
Comprehensive income |  |  |  |  |  |  |  |  | $ 843,717 | $ 519,058 | $ 156,568

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