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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Statement of Comprehensive Income [Abstract] |  |
Net income | $ 2,008 | $ 45,110
Securities available for sale: |  |
Unrealized holding gains on securities | 16,694 | 11,317
Reclassification adjustment for losses realized in net income | 0 | (10)
Total securities | 16,694 | 11,307
Derivative instruments: |  |
Unrealized holding losses on derivative instruments | (3,003) | (915)
Total derivative instruments | (3,003) | (915)
Defined benefit pension and post-retirement benefit plans: |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 46 | 54
Total defined benefit pension and post-retirement benefit plans | (46) | (54)
Other comprehensive income, net of tax | 13,737 | 10,446
Comprehensive income | $ 15,745 | $ 55,556

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