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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2020
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) |
Schedule of Changes in Accumulated Other Comprehensive Income | The following tables summarize the changes within each classification of accumulated other comprehensive income (loss) for December 31, 2020 and 2019 all shown net of tax: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on | ​ | Defined | ​ | ​ | ​
​ | ​ | Available- | ​ | Benefit | ​ | ​ | ​
​ | ​ | for-Sales | ​ | Pension | ​ | ​ | ​
(dollars in thousands) |  | Securities |  | Items |  | Total
Balance at January 1, 2020 | ​ | $ | 13,607 | ​ | $ | (1,548) | ​ | $ | 12,059
Other comprehensive income (loss) before reclassification | ​ |  | 15,917 | ​ |  | (78) | ​ |  | 15,839
Amounts reclassified from accumulated other comprehensive income (loss) | ​ |  | (342) | ​ |  | 188 | ​ |  | (154)
Net current period other comprehensive income (loss) | ​ |  | 15,575 | ​ |  | 110 | ​ |  | 15,685
Balance at December 31, 2020 | ​ | $ | 29,182 | ​ | $ | (1,438) | ​ | $ | 27,744
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on | ​ | Defined | ​ | ​ | ​
​ | ​ | Available- | ​ | Benefit | ​ | ​ | ​
​ | ​ | for-Sales | ​ | Pension | ​ | ​ | ​
(dollars in thousands) |  | Securities |  | Items |  | Total
Balance at January 1, 2019 | ​ | $ | (4,796) | ​ | $ | (1,395) | ​ | $ | (6,191)
Other comprehensive income (loss) before reclassification | ​ |  | 18,515 | ​ |  | (306) | ​ |  | 18,209
Amounts reclassified from accumulated other comprehensive income (loss) | ​ |  | (112) | ​ |  | 153 | ​ |  | 41
Net current period other comprehensive income (loss) | ​ |  | 18,403 | ​ |  | (153) | ​ |  | 18,250
Balance at December 31, 2019 | ​ | $ | 13,607 | ​ | $ | (1,548) | ​ | $ | 12,059
Schedule of reclassification Accumulated other comprehensive income | Reclassifications out of accumulated comprehensive income for the years ended December 31, 2020, 2019 and 2018 are as follows: ​
​ | ​ | ​ | ​ | ​ | ​
Details about |  | Amount |  | Affected Line Item
Accumulated Other | ​ | Reclassified From | ​ | in the Statement
Comprehensive | ​ | Accumulated Other | ​ | Where Net
Income Components | ​ | Comprehensive Income | ​ | Income is Presented
2020 | ​ | ​ | ​ | ​ | ​
(dollars in thousands) | ​ | ​ | ​ | ​ | ​
Realized gains and (losses) on available-for-sale securities | ​ | $ | 433 |  | Net securities gains (losses)
Tax effect | ​ |  | (91) |  | Income tax expense
Subtotal | ​ |  | 342 |  | Net of tax
Amortization of defined benefit pension items(1) | ​ |  | (251) |  | Salaries and employee benefits
Tax effect | ​ |  | 63 |  | Income tax expense
Subtotal | ​ |  | (188) |  | Net of tax
Total reclassifications for the period | ​ | $ | 154 |  | Net income
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
2019 | ​ |  |  |  |
(dollars in thousands) | ​ |  |  |  |
Realized gains and (losses) on available-for-sale securities | ​ | $ | 142 |  | Net securities gains (losses)
Tax effect | ​ |  | (30) |  | Income tax expense
Subtotal | ​ |  | 112 |  | Net of tax
Amortization of defined benefit pension items(1) | ​ |  | (205) |  | Salaries and employee benefits
Tax effect | ​ |  | 52 |  | Income tax expense
Subtotal | ​ |  | (153) |  | Net of tax
Total reclassifications for the period | ​ | $ | (41) |  | Net income
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
2018 | ​ |  |  |  |
(dollars in thousands) | ​ |  |  |  |
Realized gains and (losses) on available-for-sale securities | ​ | $ | (50) |  | Net securities gains (losses)
Tax effect | ​ |  | 11 |  | Income tax expense
Subtotal | ​ |  | (39) |  | Net of tax
Amortization of defined benefit pension items(1) | ​ |  | (266) |  | Salaries and employee benefits
Tax effect | ​ |  | 69 |  | Income tax expense
Subtotal | ​ |  | (197) |  | Net of tax
Total reclassifications for the period | ​ | $ | (236) |  | Net income
​
(1) | Included in the computation of net pension plan expense as more fully discussed in Note 11 – Pension and Other Postretirement Plans.

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