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Other Comprehensive Income (Loss) (Tables) | 6 Months Ended
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Jun. 30, 2022
Equity [Abstract] |
Changes in the components of other comprehensive income | Changes in the components of other comprehensive income, net of tax, were as follows for the periods presented:
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Three months ended June 30, 2022 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (76,405) |  |  | $ | (19,447) |  |  | $ | (56,958) |
Amortization of unrealized holding gains on securities transferred to the held to maturity category | (220) |  |  | (56) |  |  | (164) |
Total securities available for sale | (76,625) |  |  | (19,503) |  |  | (57,122) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 8,401 |  |  | 2,139 |  |  | 6,262 |
Total derivative instruments | 8,401 |  |  | 2,139 |  |  | 6,262 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 41 |  |  | 10 |  |  | 31 |
Total defined benefit pension and post-retirement benefit plans | 41 |  |  | 10 |  |  | 31 |
Total other comprehensive loss | $ | (68,183) |  |  | $ | (17,354) |  |  | $ | (50,829) |
Three months ended June 30, 2021 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | 4,965 |  |  | 1,263 |  |  | 3,702 |
Total securities available for sale | 4,965 |  |  | 1,263 |  |  | 3,702 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (6,234) |  |  | (1,586) |  |  | (4,648) |
Total derivative instruments | (6,234) |  |  | (1,586) |  |  | (4,648) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 76 |  |  | 19 |  |  | 57 |
Total defined benefit pension and post-retirement benefit plans | 76 |  |  | 19 |  |  | 57 |
Total other comprehensive loss | $ | (1,193) |  |  | $ | (304) |  |  | $ | (889) |
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Six months ended June 30, 2022 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (211,161) |  |  | $ | (53,741) |  |  | $ | (157,420) |
Amortization of unrealized holding gains on securities transferred to the held to maturity category | (319) |  |  | (81) |  |  | (238) |
Total securities available for sale | (211,480) |  |  | (53,822) |  |  | (157,658) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 16,957 |  |  | 4,316 |  |  | 12,641 |
Total derivative instruments | 16,957 |  |  | 4,316 |  |  | 12,641 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 83 |  |  | 21 |  |  | 62 |
Total defined benefit pension and post-retirement benefit plans | 83 |  |  | 21 |  |  | 62 |
Total other comprehensive loss | $ | (194,440) |  |  | $ | (49,485) |  |  | $ | (144,955) |
Six months ended June 30, 2021 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (15,079) |  |  | $ | (3,838) |  |  | $ | (11,241) |
Reclassification adjustment for gains realized in net income | (1,357) |  |  | (345) |  |  | (1,012) |
Total securities available for sale | (16,436) |  |  | (4,183) |  |  | (12,253) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 8,500 |  |  | 2,164 |  |  | 6,336 |
Total derivative instruments | 8,500 |  |  | 2,164 |  |  | 6,336 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 130 |  |  | 31 |  |  | 99 |
Total defined benefit pension and post-retirement benefit plans | 130 |  |  | 31 |  |  | 99 |
Total other comprehensive loss | $ | (7,806) |  |  | $ | (1,988) |  |  | $ | (5,818) |
Accumulated balances for each component of other comprehensive income, net of tax | The accumulated balances for each component of other comprehensive income, net of tax, were as follows as of the dates presented:
| June 30, 2022 |  | December 31, 2021
Unrealized losses on securities | $ | (166,774) |  |  | $ | (9,116) |
Unrealized gains on derivative instruments | 16,604 |  |  | 3,963 |
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations | (5,228) |  |  | (5,290) |
Total accumulated other comprehensive loss | $ | (155,398) |  |  | $ | (10,443) |

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