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Accumulated Other Comprehensive Income (Loss) (Tables) | 3 Months Ended
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Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) |
Schedule of components of accumulated other comprehensive income (loss) | The changes in each component of accumulated other comprehensive income (loss), net of tax, were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Unrealized Gains |  | ​ | ​ |  | ​ | ​
​ | ​ | ​ | ​ | ​ | and Losses | ​ | Gains and | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | on Securities | ​ | Losses on | ​ | ​ | ​
​ | ​ | Benefit | ​ | Available | ​ | Cash Flow | ​ | ​ | ​
(Dollars in thousands) | ​ | Plans | ​ | for Sale | ​ | Hedges | ​ | Total
Three Months Ended March 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2020 | ​ | $ | (151) | ​ | $ | 47,740 | ​ | $ | — | ​ | $ | 47,589
Other comprehensive loss before reclassifications | ​ |  | — | ​ |  | (48,620) | ​ |  | — | ​ |  | (48,620)
Amounts reclassified from accumulated other comprehensive loss | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Net comprehensive loss | ​ |  | — | ​ |  | (48,620) | ​ |  | — | ​ |  | (48,620)
Balance at March 31, 2021 | ​ | $ | (151) | ​ | $ | (880) | ​ | $ | — | ​ | $ | (1,031)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended March 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2019 | ​ | $ | (149) | ​ | $ | 11,922 | ​ | $ | (10,756) | ​ | $ | 1,017
Other comprehensive income (loss) before reclassifications | ​ |  | — | ​ |  | 31,551 | ​ |  | (22,240) | ​ | ​ | 9,311
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | — | ​ |  | (563) | ​ |  | (563)
Net comprehensive income (loss) | ​ |  | — | ​ |  | 31,551 | ​ |  | (22,803) | ​ |  | 8,748
Balance at March 31, 2020 | ​ | $ | (149) | ​ | $ | 43,473 | ​ | $ | (33,559) | ​ | $ | 9,765
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of reclassifications out of accumulated other comprehensive income (loss), net of tax | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | ​ | ​
(Dollars in thousands) | ​ | For the Three Months Ended March 31, | ​ | ​
Accumulated Other Comprehensive Income (Loss) Component |  | 2021 |  | 2020 |  | Income Statement Line Item Affected
Gains on cash flow hedges: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest rate contracts | ​ | $ | — | ​ | $ | (722) | ​ | Interest expense
​ | ​ | ​ | — | ​ | ​ | 159 | ​ | Provision for income taxes
​ | ​ | ​ | — | ​ | ​ | (563) | ​ | Net income
Total reclassifications for the period | ​ | $ | — | ​ | $ | (563) | ​ | ​

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