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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
Net income (loss) | $ 129,582 | $ 79,356 | $ 325,472 | $ (148,749)
Other comprehensive income (loss) before income taxes: |  |  |  |
Net change in unrealized gain or loss on securities available for sale and cash flow hedges | (48,569) | 425 | (143,924) | 217,254
Reclassification of net income realized and included in earnings | (6,425) | (4,076) | (9,337) | (6,593)
Valuation adjustments to pension plan attributable to the Voluntary Early Retirement Incentive Program (VERIP) and curtailment |  |  | 59,606 |
Other valuation adjustments to employee benefit plans |  |  | (10,651) | (10,251)
Amortization of unrealized net gain on securities transferred to held to maturity | (33) | (89) | (134) | (378)
Other comprehensive income (loss) before income taxes | (55,027) | (3,740) | (104,440) | 200,032
Income tax expense (benefit) | (12,363) | 48 | (24,569) | 46,370
Other comprehensive income (loss) net of income taxes | (42,664) | (3,788) | (79,871) | 153,662
Comprehensive income | $ 86,918 | $ 75,568 | $ 245,601 | $ 4,913

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