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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Pension and other post retirement obligations: |  |  |
Amortization of actuarial gains (losses) included in net periodic pension cost, gross | $ 17,443 | $ 8,379 | $ (2,563)
Tax effect | (4,192) | (2,012) | 605
Amortization of actuarial gains (losses) included in net periodic pension cost, net | 13,251 | 6,367 | (1,958)
Amortization of prior service cost included in net periodic pension cost, gross | 200 | (471) | (115)
Tax effect | (48) | 113 | 28
Amortization of prior service cost included in net periodic pension cost, net | 152 | (358) | (87)
Other comprehensive income (loss) related to pension and other post retirement obligations, net of taxes | 13,403 | 6,009 | (2,045)
Unrealized gains (losses) on available-for-sale securities: |  |  |
Net unrealized holding (losses) gains arising during period, gross | (166,007) | 87,237 | 53,988
Tax effect | 39,900 | (20,943) | (13,176)
Net unrealized holding (losses) gains arising during period, net | (126,107) | 66,294 | 40,812
Reclassification adjustment for net (gains) included in net income, gross | 0 | 0 | (4,882)
Tax effect | 0 | 0 | 1,194
Reclassification adjustment for net (gains) included in net income, net | 0 | 0 | (3,688)
Other comprehensive (loss) gain related to unrealized (losses) gains on available-for-sale securities, net of taxes | (126,107) | 66,294 | 37,124
Other comprehensive (loss) income, net of tax | (112,704) | 72,303 | 35,079
Net income | 189,694 | 164,676 | 169,063
Comprehensive income | 76,990 | 236,979 | 204,142
Accumulated Other Comprehensive (Loss) Income By Component: |  |  |
Unrealized (loss) for pension and other postretirement obligations | (20,624) | (38,267) | (46,175)
Tax effect | 5,154 | 9,394 | 11,293
Net unrealized (loss) for pension and other postretirement obligations | (15,470) | (28,873) | (34,882)
Unrealized (loss) gain on available-for-sale securities | (45,893) | 120,114 | 32,877
Tax effect | 10,736 | (29,164) | (8,221)
Net unrealized (loss) gain on available-for-sale securities | (35,157) | 90,950 | 24,656
Accumulated other comprehensive (loss) income | $ (50,627) | $ 62,077 | $ (10,226)

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