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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Summary of Per Common Share Data and Amounts | The following table presents a summary of earnings per common share data and amounts for the periods indicated.
| Year ended December 31,
($ in thousands, except per share data) | 2020 |  | 2019 |  | 2018
Net income | $ | 74,384 |  |  | $ | 92,739 |  |  | $ | 89,217 |
Weighted average common shares outstanding | 26,954 |  |  | 26,045 |  |  | 23,100 |
Additional dilutive common stock equivalents | 35 |  |  | 114 |  |  | 189 |
Weighted average diluted common shares outstanding | 26,989 |  |  | 26,159 |  |  | 23,289 |
Basic earnings per common share: | $ | 2.76 |  |  | $ | 3.56 |  |  | $ | 3.86 |
Diluted earnings per common share: | $ | 2.76 |  |  | $ | 3.55 |  |  | $ | 3.83 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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