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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Beginning balance |  | $ 257,069 | $ 247,032 | $ 245,042 | $ 272,114
Unrealized loss on available for sale securities, net of tax |  | (7,033) | (19,766) | (8,288) | (53,382)
Realized losses on securities, net of tax | [1],[2] | 0 | 0 | 556 | 0
Amortization of unrealized losses on securities previously transferred to held to maturity, net of tax | [3] | 244 | 523 | 731 | 0
Amortization of pension net loss, transition liability and prior service cost, net of tax | [2],[4] | 74 | 79 | 246 | 237
TOTAL OTHER COMPREHENSIVE LOSS |  | (6,715) | (19,164) | (6,755) | (53,145)
Ending balance |  | 255,638 | 232,370 | 255,638 | 232,370
Unrealized Losses on Securities |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Beginning balance |  |  |  | (52,734) | (3,474)
Unrealized loss on available for sale securities, net of tax |  |  |  | (8,288) | (53,382)
Realized losses on securities, net of tax |  |  |  | 556 |
Amortization of unrealized losses on securities previously transferred to held to maturity, net of tax |  |  |  | 731 |
Amortization of pension net loss, transition liability and prior service cost, net of tax |  |  |  | 0 | 0
TOTAL OTHER COMPREHENSIVE LOSS |  |  |  | (7,001) | (53,382)
Ending balance |  | (59,735) | (56,856) | (59,735) | (56,856)
Pension Liability |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Beginning balance |  |  |  | (5,278) | (6,071)
Unrealized loss on available for sale securities, net of tax |  |  |  | 0 | 0
Realized losses on securities, net of tax |  |  |  | 0 |
Amortization of unrealized losses on securities previously transferred to held to maturity, net of tax |  |  |  | 0 |
Amortization of pension net loss, transition liability and prior service cost, net of tax |  |  |  | 246 | 237
TOTAL OTHER COMPREHENSIVE LOSS |  |  |  | 246 | 237
Ending balance |  | (5,032) | (5,834) | (5,032) | (5,834)
Accumulated Other Comprehensive Loss |  |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |  |
Beginning balance |  | (58,052) | (43,526) | (58,012) | (9,545)
Unrealized loss on available for sale securities, net of tax |  |  |  | (8,288) | (53,382)
Realized losses on securities, net of tax |  |  |  | 556 |
Amortization of unrealized losses on securities previously transferred to held to maturity, net of tax |  |  |  | 731 |
Amortization of pension net loss, transition liability and prior service cost, net of tax |  |  |  | 246 | 237
TOTAL OTHER COMPREHENSIVE LOSS |  |  |  | (6,755) | (53,145)
Ending balance |  | $ (64,767) | $ (62,690) | $ (64,767) | $ (62,690)
[1] | Gross amounts are included in net gains on sales or call of securities on the Consolidated Statements of Income in total other income.
[2] | Income tax amounts are included in the provision for income taxes on the Consolidated Statements of Income.
[3] | Total unrealized loss remaining on investment securities held to maturity, net of income taxes, was $2.3 million at September 30, 2023
[4] | Gross amounts are included in the computation of net periodic benefit cost and are included in salaries and employee benefits on the Consolidated Statements of Income in total other expenses.

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