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Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Consolidated Statements of Comprehensive Income [Abstract] |  |  |
Net income | $ 121,021 | $ 112,566 | $ 82,151
Securities available for sale: |  |  |
Unrealized net holding gains (losses) arising during the period, gross | 25,836 | (11,985) | (6,915)
Tax effect | (6,459) | 2,996 | 2,845
Unrealized net holding gains (losses) arising during the period, net | 19,377 | (8,989) | (4,070)
Reclassification adjustment for net (gains) losses in net income, gross | 79 | 6,622 | (1,869)
Tax effect | (20) | (1,655) | 716
Reclassification adjustment for net (gains) losses in net income, net | 59 | 4,967 | (1,153)
Amortization of unrealized net gains for the reclassification of available for sale securities to held to maturity, gross | 737 | 688 | 875
Tax effect | (184) | (172) | (335)
Amortization of unrealized net gains for the reclassification of available for sale securities to held to maturity, net | 553 | 516 | 540
Reclassification adjustment for an impairment write-down of equity security, gross | 0 | 0 | 1,312
Tax effect | 0 | 0 | (501)
Reclassification adjustment for an impairment write-down of equity security, net | 0 | 0 | 811
Total securities available for sale, net | 19,989 | (3,506) | (3,872)
Cash flow hedges: |  |  |
Unrealized (losses) gains on derivatives (cash flow hedges), gross | (459) | 1,218 | 901
Tax effect | 115 | (304) | (350)
Unrealized (losses) gains on derivatives (cash flow hedges), net | (344) | 914 | 551
Reclassification of net unrealized (gains) on cash flow hedges to interest (income), gross | (2,012) | (2,300) | (292)
Tax effect | 503 | 575 | 113
Reclassification of net unrealized (gains) on cash flow hedges to interest (income), net | (1,509) | (1,725) | (179)
Total cash flow hedges, net | (1,853) | (811) | 372
Pension and other benefits: |  |  |
Amortization of prior service cost and actuarial losses, gross | 2,686 | 1,145 | 1,852
Tax effect | (672) | (286) | (740)
Amortization of prior service cost and actuarial losses, net | 2,014 | 859 | 1,112
Decrease (increase) in unrecognized actuarial loss, gross | 5,331 | (12,457) | 2,401
Tax effect | (1,333) | 3,038 | (570)
Decrease (increase) in unrecognized actuarial loss, net | 3,998 | (9,419) | 1,831
Total pension and other benefits, net | 6,012 | (8,560) | 2,943
Total other comprehensive income (loss) | 24,148 | (12,877) | (557)
Comprehensive income | $ 145,169 | $ 99,689 | $ 81,594

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