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Nature of Operations and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2023
Nature of Operations and Summary of Significant Accounting Policies |
Schedule of goodwill and intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2023 |  | 2022
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​
Goodwill – Branch acquisitions | ​ | $ | 5,396 | ​ | $ | 5,396
Deposit intangibles | ​ |  |  | ​ |  |
Fifth Third Bank (January 2016) | ​ |  | — | ​ |  | 53
Arena Naming Rights (April 2022) | ​ |  | 5,131 | ​ |  | 5,364
​ | ​ |  | 5,131 | ​ |  | 5,417
​ | ​ | $ | 10,527 | ​ | $ | 10,813
Schedule of earnings per common share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2023 |  | 2022 |  | 2021
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income and net income available to common shareholders | ​ | $ | 67,800 | ​ | $ | 75,948 | ​ | $ | 74,627
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common shares outstanding | ​ |  | 11,992 | ​ |  | 12,516 | ​ |  | 13,558
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average common share stock options outstanding | ​ |  | 88 | ​ |  | 91 | ​ |  | 116
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Average diluted common shares | ​ |  | 12,080 | ​ |  | 12,607 | ​ |  | 13,674
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – basic | ​ | $ | 5.65 | ​ | $ | 6.07 | ​ | $ | 5.50
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Earnings per common share – diluted | ​ | $ | 5.61 | ​ | $ | 6.02 | ​ | $ | 5.46
Schedule of Company's Consolidated Statements of Cash Flows | A summary of corrections reflecting the prior period impacts to the Company’s Consolidated Statements of Cash Flows are shown below (in thousands of dollars):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, 2022
​ | ​ | As Previously | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Presented | ​ | Net Change | ​ | As Corrected
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Operating Activities |  | ​ |  |  | ​ |  |  | ​ |
Accretion of deferred income, premiums, discounts and other | ​ | $ | (7,719) | ​ | $ | (8,123) | ​ | $ | (15,842)
Prepaid expenses and other assets | ​ |  | (24,248) | ​ |  | 26,389 | ​ |  | 2,141
Net cash provided by operating activities | ​ |  | 66,580 | ​ |  | 18,266 | ​ |  | 84,846
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investing Activities | ​ |  |  | ​ |  |  | ​ |  |
Investment in tax credit partnerships | ​ |  | — | ​ |  | (18,266) | ​ |  | (18,266)
Net cash used in investing activities | ​ |  | (801,280) | ​ |  | (18,266) | ​ |  | (819,546)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Year Ended December 31, 2021
​ | ​ | As Previously | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Presented | ​ | Net Change | ​ | As Corrected
​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​
Operating Activities |  | ​ |  |  | ​ |  |  | ​ |
Accretion of deferred income, premiums, discounts and other | ​ | $ | (10,262) | ​ | $ | (8,123) | ​ | $ | (18,385)
Prepaid expenses and other assets | ​ |  | 3,257 | ​ |  | 16,889 | ​ |  | 20,146
Net cash provided by operating activities | ​ |  | 84,976 | ​ |  | 8,766 | ​ |  | 93,742
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investing Activities | ​ |  |  | ​ |  |  | ​ |  |
Investment in tax credit partnerships | ​ |  | — | ​ |  | (8,766) | ​ |  | (8,766)
Net cash provided by investing activities | ​ |  | 190,713 | ​ |  | (8,766) | ​ |  | 181,947

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