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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2024
Nature of Operations and Summary of Significant Accounting Policies |
Schedule of goodwill and intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2024 |  | 2023
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​
Goodwill – Branch acquisitions | ​ | $ | 5,396 | ​ | $ | 5,396
Arena Naming Rights (April 2022) | ​ |  | 4,698 | ​ |  | 5,131
​ | ​ | $ | 10,094 | ​ | $ | 10,527
Schedule of earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 |  | 2023 |  | 2022
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income and net income available to common shareholders | ​ | $ | 61,807 | ​ | $ | 67,800 | ​ | $ | 75,948
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common shares outstanding | ​ |  | 11,695 | ​ |  | 11,992 | ​ |  | 12,516
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common share stock options outstanding | ​ |  | 60 | ​ |  | 88 | ​ |  | 91
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average diluted common shares | ​ |  | 11,755 | ​ |  | 12,080 | ​ |  | 12,607
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – basic | ​ | $ | 5.28 | ​ | $ | 5.65 | ​ | $ | 6.07
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – diluted | ​ | $ | 5.26 | ​ | $ | 5.61 | ​ | $ | 6.02

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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- Definition Tabular disclosure of goodwill and intangible assets, which may be broken down by segment or major class. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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