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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2023
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, 2023 |  | Securities |  | Hedges |  | Pension Items |  | on Liabilities |  | Total
​ |  | (In thousands)
Beginning balance, net of tax | ​ | $ | (63,106) | ​ | $ | 25,380 | ​ | $ | (275) | ​ | $ | 1,513 | ​ | $ | (36,488)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income (loss) before reclassifications, net of tax | ​ |  | 8,362 | ​ |  | 6,943 | ​ |  | 170 | ​ |  | 165 | ​ |  | 15,640
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | ​ |  | — | ​ |  | (17,527) | ​ |  | (276) | ​ |  | — | ​ |  | (17,803)
Net current period other comprehensive income (loss), net of tax | ​ |  | 8,362 | ​ |  | (10,584) | ​ |  | (106) | ​ |  | 165 | ​ |  | (2,163)
Ending balance, net of tax | ​ | $ | (54,744) | ​ | $ | 14,796 | ​ | $ | (381) | ​ | $ | 1,678 | ​ | $ | (38,651)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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 (loss) 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 (loss), 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 (loss) 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 (loss), 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)
Schedule of amounts reclassified from accumulated other comprehensive income (loss) by component | ​
​ | ​ | ​ | ​ | ​ | ​
For the year ended December 31, 2023
Details about Accumulated Other | ​ | ​ | Amounts Reclassified from | ​ | Affected Line Item in the Statement
Comprehensive Income (Loss) Components |  | ​ | Accumulated Other Comprehensive Income (Loss) |  | Where Net Income (Loss) is Presented
(In thousands)
Cash flow hedges: | ​ |  |  |  |
Interest rate swaps benefit (expense) | ​ | $ | 25,424 |  | Interest expense
​ | ​ |  | (7,897) |  | Provision for income taxes
​ | ​ | $ | 17,527 |  | ​
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses benefit (expense) | ​ | $ | 399 | (1) | Other operating expense
​ | ​ |  | (123) | ​ | Provision for income taxes
​ | ​ | $ | 276 |  | ​
​
​ | ​ | ​ | ​ | ​ | ​
For the year ended December 31, 2022
​ | ​ | Amounts Reclassified from | ​ | ​
Details about Accumulated Other | ​ | Accumulated Other | ​ | Affected Line Item in the Statement
Comprehensive Income (Loss) Components |  | Comprehensive Income (Loss) |  | Where Net Income (Loss) is Presented
(In thousands)
Unrealized gains (losses) on available for sale securities: | ​ |  |  |  |
​ | ​ | $ | (10,948) |  | Net gain (loss) on sale of securities
​ | ​ |  | 3,401 |  | Provision for income taxes
​ | ​ | $ | (7,547) |  | ​
​ | ​ | ​ | ​ | ​ | ​
Cash flow hedges: | ​ |  |  |  |
Interest rate swaps benefit (expense) | ​ | $ | (4,341) |  | Interest expense
​ | ​ |  | 1,367 |  | Provision for income taxes
​ | ​ | $ | (2,974) |  | ​
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses benefit (expense) | ​ | $ | 24 | (1) | Other operating expense
Prior service credits benefit (expense) | ​ |  | 27 | (1) | Other operating expense
​ | ​ |  | 51 | ​ | Total before tax
​ | ​ |  | (15) | ​ | Provision for income taxes
​ | ​ | $ | 36 |  | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​
For the year ended December 31, 2021
​ | ​ | Amounts Reclassified from | ​ | ​
Details about Accumulated Other | ​ | Accumulated Other | ​ | Affected Line Item in the Statement
Comprehensive Income (Loss) Components |  | Comprehensive Income (Loss) |  | Where Net Income (Loss) is Presented
(In thousands)
Unrealized gains (losses) on available for sale securities: | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 113 |  | Net gain (loss) on sale of securities
​ | ​ |  | (35) |  | Provision for income taxes
​ | ​ | $ | 78 |  | ​
​ | ​ | ​ | ​ | ​ | ​
Cash flow hedges: | ​ |  |  |  |
Interest rate swaps benefit (expense) | ​ | $ | (10,623) |  | Interest expense
​ | ​ |  | 3,327 |  | Provision for income taxes
​ | ​ | $ | (7,296) | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
Amortization of defined benefit pension items: | ​ |  |  | ​ |
Actuarial losses benefit (expense) | ​ | $ | (500) | (1) | Other operating expenses
Prior service credits benefit (expense) | ​ |  | 85 | (1) | Other operating expenses
​ | ​ |  | (415) | ​ | Total before tax
​ | ​ |  | 132 |  | Provision for income taxes
​ | ​ | $ | (283) |  | ​
(1) These accumulated other comprehensive loss components are included in the computation of net periodic pension cost. See Note 12 (“Pension and Other Postretirement Benefit Plans”) for additional information.

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