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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 302,556 | $ 33,586 | $ 451,712 | $ 45,786
Defined benefit pension plans |  |  |  |
Amortization of actuarial (gain) loss, net of tax | (3) | 150 | (7) | 301
Effects of Settlements, net of tax | 0 | 0 | 0 | 64
Other comprehensive income (loss), net of tax | (3) | 150 | (7) | 365
Comprehensive income | $ 302,553 | $ 33,736 | $ 451,705 | $ 46,151

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