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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2022
Nature of Operations and Summary of Significant Accounting Policies |
Schedule of goodwill and intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2022 |  | 2021
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​
Goodwill – Branch acquisitions | ​ | $ | 5,396 | ​ | $ | 5,396
Deposit intangibles | ​ |  |  | ​ |  |
Fifth Third Bank (January 2016) | ​ |  | 53 | ​ |  | 685
Arena Naming Rights (April 2022) | ​ |  | 5,364 | ​ |  | —
​ | ​ |  | 5,417 | ​ |  | 685
​ | ​ | $ | 10,813 | ​ | $ | 6,081
​
Schedule of earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income and net income available to common shareholders | ​ | $ | 75,948 | ​ | $ | 74,627 | ​ | $ | 59,313
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common shares outstanding | ​ |  | 12,516 | ​ |  | 13,558 | ​ |  | 14,043
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common share stock options outstanding | ​ |  | 91 | ​ |  | 116 | ​ |  | 61
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average diluted common shares | ​ |  | 12,607 | ​ |  | 13,674 | ​ |  | 14,104
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – basic | ​ | $ | 6.07 | ​ | $ | 5.50 | ​ | $ | 4.22
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – diluted | ​ | $ | 6.02 | ​ | $ | 5.46 | ​ | $ | 4.21
​

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 + Details
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