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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2022
Accumulated Other Comprehensive Loss. |
Schedule of accumulated other comprehensive loss components | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Accumulated Other Comprehensive Loss(1)
​ | ​ | ​ | ​ | ​ | Unrealized (losses) | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | gains on | ​ | ​ | ​
​ | ​ | Defined Benefit | ​ | available for sale | ​ | ​ | ​
​ |  | Pension Plan |  | securities |  | Total
Balance at December 31, 2021 | ​ | $ | (3,901) | ​ | $ | (2,734) | ​ | $ | (6,635)
Other comprehensive loss before reclassifications | ​ |  | (307) | ​ |  | (25,592) | ​ |  | (25,899)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 211 | ​ |  | 134 | ​ |  | 345
Period change | ​ |  | (96) | ​ |  | (25,458) | ​ |  | (25,554)
Balance at December 31, 2022 | ​ | $ | (3,997) | ​ | $ | (28,192) | ​ | $ | (32,189)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2020 | ​ | $ | (4,784) | ​ | $ | 993 | ​ | $ | (3,791)
Other comprehensive gain (loss) before reclassifications | ​ |  | 600 | ​ |  | (3,730) | ​ |  | (3,130)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | 283 | ​ |  | 3 | ​ |  | 286
Period change | ​ |  | 883 | ​ |  | (3,727) | ​ |  | (2,844)
Balance at December 31, 2021 | ​ | $ | (3,901) | ​ | $ | (2,734) | ​ | $ | (6,635)
(1) | All amounts are net of tax. Related income tax expense or benefit is calculated using an income tax rate of 21.0%.
​
Schedule of accumulated other comprehensive loss activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amount Reclassified from | ​ | ​
​ | ​ | Accumulated Other Comprehensive | ​ | ​
​ | ​ | Income for the Year Ended | ​ | Affected Line Item in the Consolidated
​ | ​ | December 31, | ​ | Statement of Income
​ | ​ | 2022 |  | 2021 |  | ​
Securities available for sale(1): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net securities losses reclassified into earnings | ​ | $ | (170) | ​ | $ | (4) |  | Net realized loss on sales and calls of securities
Related income tax expense | ​ |  | 36 | ​ |  | 1 |  | Provision for income taxes
Net effect on accumulated other comprehensive loss for the period | ​ |  | (134) | ​ |  | (3) |  |
Defined benefit pension plan(2): | ​ |  |  | ​ |  |  |  |
Amortization of net loss and prior service costs | ​ |  | (267) | ​ |  | (358) |  | Other non-interest expense
Related income tax expense | ​ |  | 56 | ​ |  | 75 |  | Provision for income taxes
Net effect on accumulated other comprehensive loss for the period | ​ |  | (211) | ​ |  | (283) |  |
Total reclassifications for the period | ​ | $ | (345) | ​ | $ | (286) |  |
(1) | For additional details related to unrealized gains and losses on securities and related amounts reclassified from accumulated other comprehensive loss see Note 3, “Available for Sale Securities.”
(2) | Included in the computation of net periodic pension cost. See Note 10, “Employee Benefits” for additional details.

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