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Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Earnings Per Share [Abstract] |
Summary of the net income allocated to common shares and the basic and diluted shares used in the net income per share computations | The following table summarizes the net income allocated to common shares and the basic and diluted shares used in the net income per share computations:
| Year Ended December 31,
(in thousands) | 2020 | 2019 | 2018
Net income | $ | 138,237 |  | $ | 151,099 |  | $ | 135,413 |
Less distributed and undistributed earnings allocated to participating securities | (782) |  | (1,759) |  | (1,875) |
Net income allocated to common shares | $ | 137,455 |  | $ | 149,340 |  | $ | 133,538 |
Weighted average common shares outstanding | 38,503 |  | 40,186 |  | 41,217 |
Incremental shares from assumed time-vested and performance-based RSU awards and conversions of common stock options | 317 |  | 166 |  | 289 |
Adjusted weighted average common shares outstanding | 38,820 |  | 40,352 |  | 41,506 |
Potentially dilutive securities not included in weighted average share calculation due to anti-dilutive effect | 133 |  | — |  | — |

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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 http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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