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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Pension and other post retirement obligations: |  |  |
Amortization of actuarial (losses) gains included in net periodic pension cost, gross | $ (21,587) | $ 17,443 | $ 8,379
Tax effect | 5,243 | (4,192) | (2,012)
Amortization of actuarial (losses) gains included in net periodic pension cost, net | (16,344) | 13,251 | 6,367
Amortization of prior service cost included in net periodic pension cost, gross | 678 | 200 | (471)
Tax effect | (165) | (48) | 113
Amortization of prior service cost included in net periodic pension cost, net | 513 | 152 | (358)
Other comprehensive (loss) income related to pension and other post retirement obligations, net of taxes | (15,831) | 13,403 | 6,009
Unrealized (losses) gains on investment securities: |  |  |
Net unrealized holding (losses) gains on investment securities, gross | (818,890) | (166,007) | 87,237
Tax effect | 198,909 | 39,900 | (20,943)
Other comprehensive (loss) gain related to unrealized (losses) gains on investment securities, net of taxes | (619,981) | (126,107) | 66,294
Other comprehensive (loss) income, net of tax | (635,812) | (112,704) | 72,303
Net income | 188,081 | 189,694 | 164,676
Comprehensive (loss) income | (447,731) | 76,990 | 236,979
Accumulated Other Comprehensive (Loss) Income By Component: |  |  |
Unrealized (loss) for pension and other postretirement obligations | (41,533) | (20,624) | (38,267)
Tax effect | 10,232 | 5,154 | 9,394
Net unrealized (loss) for pension and other postretirement obligations | (31,301) | (15,470) | (28,873)
Unrealized (loss) gain on investment securities | (864,783) | (45,893) | 120,114
Tax effect | 209,645 | 10,736 | (29,164)
Net unrealized (loss) gain on investment securities | (655,138) | (35,157) | 90,950
Accumulated other comprehensive (loss) income | $ (686,439) | $ (50,627) | $ 62,077

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