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Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2020
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, 2020 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 3,496 |  |  | $ | 893 |  |  | $ | 2,603 |
Reclassification adjustment for gains realized in net income | (31) |  |  | (8) |  |  | (23) |
Total securities available for sale | 3,465 |  |  | 885 |  |  | 2,580 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (1,064) |  |  | (271) |  |  | (793) |
Total derivative instruments | (1,064) |  |  | (271) |  |  | (793) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 68 |  |  | 17 |  |  | 51 |
Total defined benefit pension and post-retirement benefit plans | 68 |  |  | 17 |  |  | 51 |
Total other comprehensive income | $ | 2,469 |  |  | $ | 631 |  |  | $ | 1,838 |
Three months ended June 30, 2019 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 12,599 |  |  | $ | 3,206 |  |  | $ | 9,393 |
Reclassification adjustment for losses realized in net income | 8 |  |  | 2 |  |  | 6 |
Total securities available for sale | 12,607 |  |  | 3,208 |  |  | 9,399 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (2,067) |  |  | (526) |  |  | (1,541) |
Total derivative instruments | (2,067) |  |  | (526) |  |  | (1,541) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 137 |  |  | 35 |  |  | 102 |
Total defined benefit pension and post-retirement benefit plans | 137 |  |  | 35 |  |  | 102 |
Total other comprehensive income | $ | 10,677 |  |  | $ | 2,717 |  |  | $ | 7,960 |
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Six months ended June 30, 2020 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 25,885 |  |  | $ | 6,588 |  |  | $ | 19,297 |
Reclassification adjustment for gains realized in net income | (31) |  |  | (8) |  |  | (23) |
Total securities available for sale | 25,854 |  |  | 6,580 |  |  | 19,274 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (5,092) |  |  | (1,296) |  |  | (3,796) |
Total derivative instruments | (5,092) |  |  | (1,296) |  |  | (3,796) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 130 |  |  | 33 |  |  | 97 |
Total defined benefit pension and post-retirement benefit plans | 130 |  |  | 33 |  |  | 97 |
Total other comprehensive income | $ | 20,892 |  |  | $ | 5,317 |  |  | $ | 15,575 |
Six months ended June 30, 2019 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | 27,780 |  |  | $ | 7,070 |  |  | $ | 20,710 |
Reclassification adjustment for gains realized in net income | (5) |  |  | (1) |  |  | (4) |
Total securities available for sale | 27,775 |  |  | 7,069 |  |  | 20,706 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (3,294) |  |  | (838) |  |  | (2,456) |
Total derivative instruments | (3,294) |  |  | (838) |  |  | (2,456) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 209 |  |  | 53 |  |  | 156 |
Total defined benefit pension and post-retirement benefit plans | 209 |  |  | 53 |  |  | 156 |
Total other comprehensive income | $ | 24,690 |  |  | $ | 6,284 |  |  | $ | 18,406 |
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, 2020 |  | December 31, 2019
Unrealized gains on securities | $ | 40,837 |  |  | $ | 21,563 |
Non-credit related portion of previously recorded other-than-temporary impairment on securities | (11,319) |  |  | (11,319) |
Unrealized losses on derivative instruments | (6,643) |  |  | (2,847) |
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations | (6,536) |  |  | (6,633) |
Total accumulated other comprehensive income | $ | 16,339 |  |  | $ | 764 |

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