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Summary of Unaudited Quarterly Operating Results (Tables) | 12 Months Ended
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Dec. 31, 2020
Summary of Unaudited Quarterly Operating Results |
Summary of Unaudited Quarterly Operating Results | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 2020 |  |  | ​
​ | ​ | Three Months Ended
​ |  | March 31 |  | June 30 |  | September 30 |  | December 31
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income | ​ | $ | 57,474 | ​ | $ | 54,011 | ​ | $ | 53,599 | ​ | $ | 52,619
Interest expense | ​ |  | 12,536 | ​ |  | 10,556 | ​ |  | 9,431 | ​ |  | 8,042
Provision for loan losses | ​ |  | 3,871 | ​ |  | 6,000 | ​ |  | 4,500 | ​ |  | 1,500
Net realized gains on available-for-sale securities | ​ |  | — | ​ |  | 78 | ​ |  | — | ​ |  | —
Noninterest income | ​ |  | 7,367 | ​ |  | 8,261 | ​ |  | 9,466 | ​ |  | 9,956
Noninterest expense | ​ |  | 30,815 | ​ |  | 29,349 | ​ |  | 31,988 | ​ |  | 31,073
Provision for income taxes | ​ |  | 2,751 | ​ |  | 3,164 | ​ |  | 3,692 | ​ |  | 4,172
Net income available to common shareholders | ​ |  | 14,868 | ​ |  | 13,203 | ​ |  | 13,454 | ​ |  | 17,788
Earnings per common share – diluted | ​ |  | 1.04 | ​ |  | 0.93 | ​ |  | 0.96 | ​ |  | 1.28
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 2019 |  |  | ​
​ | ​ | Three Months Ended
​ |  | March 31 |  | June 30 |  | September 30 |  | December 31
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income | ​ | $ | 57,358 | ​ | $ | 58,723 | ​ | $ | 60,187 | ​ | $ | 58,726
Interest expense | ​ |  | 12,753 | ​ |  | 13,802 | ​ |  | 14,263 | ​ |  | 13,784
Provision for loan losses | ​ |  | 1,950 | ​ |  | 1,600 | ​ |  | 1,950 | ​ |  | 650
Net realized gains (losses) on available-for-sale securities | ​ |  | 10 | ​ |  | — | ​ |  | — | ​ |  | (72)
Noninterest income | ​ |  | 7,450 | ​ |  | 7,157 | ​ |  | 8,655 | ​ |  | 7,695
Noninterest expense | ​ |  | 28,495 | ​ |  | 28,383 | ​ |  | 28,725 | ​ |  | 29,535
Provision for income taxes | ​ |  | 3,998 | ​ |  | 3,720 | ​ |  | 4,172 | ​ |  | 4,559
Net income available to common shareholders | ​ |  | 17,612 | ​ |  | 18,375 | ​ |  | 19,732 | ​ |  | 17,893
Earnings per common share – diluted | ​ |  | 1.23 | ​ |  | 1.28 | ​ |  | 1.38 | ​ |  | 1.24
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | 2018 |  |  | ​
​ | ​ | Three Months Ended
​ |  | March 31 |  | June 30 |  | September 30 |  | December 31
​ | ​ | (In Thousands, Except Per Share Data)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income | ​ | $ | 46,882 | ​ | $ | 49,943 | ​ | $ | 52,982 | ​ | $ | 56,142
Interest expense | ​ |  | 7,444 | ​ |  | 8,731 | ​ |  | 9,997 | ​ |  | 11,585
Provision for loan losses | ​ |  | 1,950 | ​ |  | 1,950 | ​ |  | 1,300 | ​ |  | 1,950
Net realized gains on available-for-sale securities | ​ |  | — | ​ |  | — | ​ |  | 2 | ​ |  | —
Noninterest income | ​ |  | 6,935 | ​ |  | 7,459 | ​ |  | 14,604 | ​ |  | 7,220
Noninterest expense | ​ |  | 28,312 | ​ |  | 29,915 | ​ |  | 28,309 | ​ |  | 28,774
Provision for income taxes | ​ |  | 2,645 | ​ |  | 2,967 | ​ |  | 5,464 | ​ |  | 3,765
Net income available to common shareholders | ​ |  | 13,466 | ​ |  | 13,839 | ​ |  | 22,516 | ​ |  | 17,288
Earnings per common share – diluted | ​ |  | 0.95 | ​ |  | 0.97 | ​ |  | 1.57 | ​ |  | 1.21

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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