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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 103,192 | $ 27,171 | $ 148,978 | $ 66,278
Defined benefit pension plans |  |  |  |
Amortization of actuarial (gain) loss, net of tax | 151 | (32) | 452 | (97)
Amortization of actuarial (gain) loss, tax | 51 | (12) | 153 | (34)
Effects of Settlements, net of tax | 0 | 1,001 | 64 | 1,001
Effect of settlements, tax effect | 0 | 341 | 22 | 341
Other comprehensive income, net of tax | 151 | 969 | 516 | 904
Comprehensive income | $ 103,343 | $ 28,140 | $ 149,494 | $ 67,182

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