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Derivatives and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2023
Derivatives and Hedging Activities |
Schedule of fair value of derivative Instruments and location in statements of financials | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Location in | ​ | Fair Value
​ | ​ | Consolidated Statements | ​ | December 31, | ​ | December 31,
​ |  | of Financial Condition |  | 2023 |  | 2022
​ | ​ | ​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivatives designated as hedging instruments | ​ | ​ | ​ | ​ |  |  | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative Liabilities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Active interest rate swaps | ​ | Accrued expenses and other liabilities | ​ | $ | 17,296 | ​ | $ | 31,277
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total derivatives designated as hedging instruments | ​ | ​ | ​ | $ | 17,296 | ​ | $ | 31,277
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivatives not designated as hedging instruments |  | ​ | ​ |  | ​ | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative Assets |  | ​ | ​ |  | ​ | ​ |  | ​
Interest rate products |  | Prepaid expenses and other assets | ​ | $ | 8,205 | ​ | $ | 11,061
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total derivatives not designated as hedging instruments | ​ | ​ | ​ | $ | 8,205 | ​ | $ | 11,061
​ |  | ​ | ​ |  | ​ | ​ |  | ​
Derivative Liabilities |  | ​ | ​ |  | ​ | ​ |  | ​
Interest rate products |  | Accrued expenses and other liabilities | ​ | $ | 8,040 | ​ | $ | 10,820
​ |  | ​ | ​ |  | ​ | ​ |  | ​
Total derivatives not designated as hedging instruments | ​ | ​ | ​ | $ | 8,040 | ​ | $ | 10,820
​
Schedule of effect of cash flow hedge accounting through accumulated other comprehensive income on statements of comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amount of Gain (Loss)
​ | ​ | Recognized in AOCI
​ | ​ | Year Ended December 31,
Cash Flow Hedges |  | 2023 |  | 2022 |  | 2021
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Terminated interest rate swaps, net of income taxes | ​ | $ | (6,267) | ​ | $ | (6,271) | ​ | $ | (6,271)
Active interest rate swaps, net of income taxes | ​ | ​ | 10,541 | ​ | ​ | (23,582) | ​ | ​ | —
​ | ​ | $ | 4,274 | ​ | $ | (29,853) | ​ | $ | (6,271)
​
Schedule of effect of cash flow hedge accounting on statements of operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended December 31,
Cash Flow Hedges |  | 2023 |  | 2022 |  | 2021
​ | ​ | Interest | ​ | Interest | ​ | Interest | ​ | Interest | ​ | Interest | ​ | Interest
​ |  | Income |  | Expense |  | Income |  | Expense |  | Income |  | Expense
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Terminated interest rate swaps | ​ | $ | 8,122 | ​ | $ | — | ​ | $ | 8,123 | ​ | $ | — | ​ | $ | 8,123 | ​ | $ | —
Active interest rate swaps | ​ | ​ | (17,618) | ​ | ​ | — | ​ | ​ | (941) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
​ | ​ | $ | (9,496) | ​ | $ | — | ​ | $ | 7,182 | ​ | $ | — | ​ | $ | 8,123 | ​ | $ | —

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- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C + Details
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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B + Details
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