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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract] |  |
Net income (loss) | $ (111,033) | $ 79,164
Other comprehensive income/loss before income taxes: |  |
Net change in unrealized gain/loss on securities available for sale and cash flow hedges | 165,297 | 57,243
Reclassification of net losses realized and included in earnings | 368 | 4,219
Amortization of unrealized net loss or gain on securities transferred to held to maturity | (195) | 591
Other comprehensive income before income taxes | 165,470 | 62,053
Income tax expense | 37,480 | 13,853
Other comprehensive income net of income taxes | 127,990 | 48,200
Comprehensive income | $ 16,957 | $ 127,364

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