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Quarterly Financial Results (unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract] |
Summary of Selected Consolidated Quarterly Financial Data | A summary of selected consolidated quarterly financial data for each of the years in the three-year period ended December 31, 2021 follows:
(in thousands, except per share data) | First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
2021 |  |  |  |  |  |  |
Interest income | $ | 251,917 |  |  | $ | 259,236 |  |  | $ | 260,868 |  |  | $ | 259,193 |
Net interest income | 222,870 |  |  | 233,225 |  |  | 237,543 |  |  | 238,763 |
Provision for credit losses | 7,235 |  |  | 2,834 |  |  | 3,382 |  |  | 2,675 |
Net income before taxes | 153,648 |  |  | 162,458 |  |  | 169,405 |  |  | 166,394 |
Net income | 125,428 |  |  | 131,790 |  |  | 136,577 |  |  | 133,528 |
Net income available to common shareholders | 121,630 |  |  | 127,992 |  |  | 132,779 |  |  | 129,730 |
Basic net income per common share | $ | 1.61 |  |  | $ | 1.70 |  |  | $ | 1.76 |  |  | $ | 1.72 |
Diluted net income per common share | $ | 1.61 |  |  | $ | 1.69 |  |  | $ | 1.75 |  |  | $ | 1.71 |
2020 |  |  |  |  |  |  |
Interest income | $ | 263,069 |  |  | $ | 251,738 |  |  | $ | 249,188 |  |  | $ | 257,047 |
Net interest income | 193,552 |  |  | 200,657 |  |  | 206,594 |  |  | 220,985 |
Provision for credit losses | 105,045 |  |  | 72,832 |  |  | 16,758 |  |  | 9,180 |
Net income before taxes | 26,691 |  |  | 73,674 |  |  | 137,049 |  |  | 133,944 |
Net income | 28,356 |  |  | 62,444 |  |  | 110,645 |  |  | 110,876 |
Net income available to common shareholders | 28,356 |  |  | 62,444 |  |  | 106,847 |  |  | 107,078 |
Basic net income per common share | $ | 0.37 |  |  | $ | 0.83 |  |  | $ | 1.42 |  |  | $ | 1.42 |
Diluted net income per common share | $ | 0.37 |  |  | $ | 0.83 |  |  | $ | 1.42 |  |  | $ | 1.42 |
2019 |  |  |  |  |  |  |
Interest income | $ | 257,883 |  |  | $ | 265,851 |  |  | $ | 275,749 |  |  | $ | 268,453 |
Net interest income | 187,246 |  |  | 188,918 |  |  | 195,806 |  |  | 194,172 |
Provision for credit losses | 7,184 |  |  | 7,195 |  |  | 8,260 |  |  | 4,644 |
Net income before taxes | 117,074 |  |  | 124,719 |  |  | 137,224 |  |  | 118,520 |
Net income available to common shareholders | 93,960 |  |  | 100,321 |  |  | 110,521 |  |  | 96,079 |
Basic net income per common share | $ | 1.22 |  |  | $ | 1.31 |  |  | $ | 1.45 |  |  | $ | 1.26 |
Diluted net income per common share | $ | 1.22 |  |  | $ | 1.31 |  |  | $ | 1.44 |  |  | $ | 1.26 |

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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=124502072&loc=d3e1280-108306 + Details
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