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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Notes Tables |
Schedule of changes in accumulated other comprehensive income (loss) by component | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized Gains | ​ | Unrealized Gains | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on | ​ | (Losses) on | ​ | ​ | ​ | ​ | Fair Value | ​ | ​ | ​
​ | ​ | Available for Sale | ​ | Cash flow | ​ | Defined Benefit | ​ | Option Elected | ​ | ​ | ​
December 31, 2022 |  | Securities |  | Hedges |  | Pension Items |  | on Liabilities |  | Total
​ |  | (In thousands)
Beginning balance, net of tax | ​ | $ | (6,272) | ​ | $ | (1,406) | ​ | $ | (1,282) | ​ | $ | 2,276 | ​ | $ | (6,684)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income before reclassifications, net of tax | ​ |  | (64,381) | ​ |  | 23,812 | ​ |  | 1,043 | ​ |  | (763) | ​ |  | (40,289)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | ​ |  | 7,547 | ​ |  | 2,974 | ​ |  | (36) | ​ |  | — | ​ |  | 10,485
Net current period other comprehensive income, net of tax | ​ |  | (56,834) | ​ |  | 26,786 | ​ |  | 1,007 | ​ |  | (763) | ​ |  | (29,804)
Ending balance, net of tax | ​ | $ | (63,106) | ​ | $ | 25,380 | ​ | $ | (275) | ​ | $ | 1,513 | ​ | $ | (36,488)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized Gains | ​ | Unrealized Gains | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on | ​ | (Losses) on | ​ | ​ | ​ | ​ | Fair Value | ​ | ​ | ​
​ | ​ | Available for Sale | ​ | Cash flow | ​ | Defined Benefit | ​ | Option Elected | ​ | ​ | ​
December 31, 2021 |  | Securities |  | Hedges |  | Pension Items |  | on Liabilities |  | Total
​ |  | (In thousands)
Beginning balance, net of tax | ​ | $ | 1,290 | ​ | $ | (17,521) | ​ | $ | (1,884) | ​ | $ | 1,849 | ​ | $ | (16,266)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income before reclassifications, net of tax | ​ |  | (7,484) | ​ |  | 8,819 | ​ |  | 319 | ​ |  | 427 | ​ |  | 2,081
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | ​ |  | (78) | ​ |  | 7,296 | ​ |  | 283 | ​ |  | — | ​ |  | 7,501
Net current period other comprehensive income, net of tax | ​ |  | (7,562) | ​ |  | 16,115 | ​ |  | 602 | ​ |  | 427 | ​ |  | 9,582
Ending balance, net of tax | ​ | $ | (6,272) | ​ | $ | (1,406) | ​ | $ | (1,282) | ​ | $ | 2,276 | ​ | $ | (6,684)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Unrealized Gains |  | Unrealized Gains |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
​ | ​ | (Losses) on | ​ | (Losses) on | ​ | ​ | ​ | ​ | ​ | Fair Value | ​ | ​ | ​
​ | ​ | Available for Sale | ​ | Cash flow | ​ | Defined Benefit | ​ | ​ | Option Elected | ​ | ​ | ​
December 31, 2020 |  | Securities |  | Hedges |  | Pension Items |  | ​ | on Liabilities | ​ | Total
​ |  | (In thousands)
Beginning balance, net of tax | ​ | $ | (3,982) | ​ | $ | (5,863) | ​ | $ | (983) | ​ | $ | 1,021 | ​ | $ | (9,807)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income before reclassifications, net of tax | ​ |  | 4,787 | ​ |  | (14,924) | ​ |  | (1,112) | ​ |  | 828 | ​ |  | (10,421)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | ​ |  | 485 | ​ |  | 3,266 | ​ |  | 211 | ​ |  | — | ​ |  | 3,962
Net current period other comprehensive income, net of tax | ​ |  | 5,272 | ​ |  | (11,658) | ​ |  | (901) | ​ |  | 828 | ​ |  | (6,459)
Ending balance, net of tax | ​ | $ | 1,290 | ​ | $ | (17,521) | ​ | $ | (1,884) | ​ | $ | 1,849 | ​ | $ | (16,266)
​
Schedule of amounts reclassified from accumulated other comprehensive income (loss) by component | ​
​ | ​ | ​ | ​ | ​ | ​
For the Year Ended December 31, 2022
​ | ​ | Amounts Reclassified from | ​ | ​
Details about Accumulated Other | ​ | Accumulated Other | ​ | Affected Line Item in the Statement
Comprehensive Income Components |  | Comprehensive Income |  | Where Net Income is Presented
(Dollars in thousands)
Unrealized gains losses on available for sale securities: | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | (10,948) | ​ | Net gain (loss) on sale of securities
​ | ​ |  | 3,401 | ​ | Tax benefit
​ | ​ | $ | (7,547) | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Cash flow hedges: | ​ |  |  | ​ |
Interest rate swaps | ​ | $ | (4,341) |  | Interest (expense)
​ | ​ |  | 1,367 |  | Tax benefit
​ | ​ | $ | (2,974) |  | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses | ​ | $ | 24 | ​ | Other operating expense
Prior service credits | ​ |  | 27 | ​ | Other operating expense
​ | ​ |  | 51 | ​ | Total before tax
​ | ​ |  | (15) |  | Tax expense
​ | ​ | $ | 36 |  | Net of tax
​
​ | ​ | ​ | ​ | ​ | ​
For the Year Ended December 31, 2021
​ | ​ | Amounts Reclassified from | ​ | ​
Details about Accumulated Other | ​ | Accumulated Other | ​ | Affected Line Item in the Statement
Comprehensive Income Components |  | Comprehensive Income |  | Where Net Income is Presented
(Dollars in thousands)
Unrealized gains (losses) on available for sale securities: | ​ | $ | 113 |  | Net gain (loss) on sale of securities
​ | ​ |  | (35) |  | Tax expense
​ | ​ | $ | 78 |  | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Cash flow hedges: | ​ |  |  |  |
Interest rate swaps | ​ | $ | (10,623) |  | Interest (expense)
​ | ​ |  | 3,327 |  | Tax benefit
​ | ​ | $ | (7,296) |  | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses | ​ | $ | (500) | ​ | Other operating expense
Prior service credits | ​ |  | 85 | ​ | Other operating expense
​ | ​ |  | (415) | ​ | Total before tax
​ | ​ |  | 132 | ​ | Tax benefit
​ | ​ | $ | (283) |  | Net of tax
​ ​ ​ ​ ​ ​
​ | ​ | ​ | ​ | ​ | ​
For the Year Ended December 31, 2020
​ | ​ | Amounts Reclassified from | ​ | ​
Details about Accumulated Other | ​ | Accumulated Other | ​ | Affected Line Item in the Statement
Comprehensive Income Components |  | Comprehensive Income |  | Where Net Income is Presented
(Dollars in thousands)
Unrealized gains (losses) on available for sale securities: | ​ | $ | (701) |  | Net loss on sale of securities
​ | ​ |  | 216 |  | Tax benefit
​ | ​ | $ | (485) |  | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Cash flow hedges: | ​ |  |  |  |
Interest rate swaps | ​ | $ | (4,732) |  | Interest expense
​ | ​ |  | 1,466 |  | Tax benefit
​ | ​ | $ | (3,266) | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses | ​ | $ | (390) | ​ | Other operating expenses
Prior service credits | ​ |  | 85 | ​ | Other operating expenses
​ | ​ |  | (305) | ​ | Total before tax
​ | ​ |  | 94 |  | Tax benefit
​ | ​ | $ | (211) |  | Net of tax

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