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Earnings per share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of earnings per share | The number of stock awards outstanding but not included in the computation of diluted earnings per common share because their effect was anti-dilutive is 1,809,069, 1,182,572 and 1,663,219 for the years ended December 31, 2019, 2020 and 2021, respectively.
| Year ended December 31,
| 2019 |  | 2020 |  | 2021
Net income | $ | 304,881 |  |  | $ | 308,276 |  |  | $ | 369,448 |
Weighted average number of common shares used in computing basic earnings per common share | 190,074,475 |  |  | 190,396,780 |  |  | 187,802,219 |
Dilutive effect of stock-based awards | 5,086,380 |  |  | 5,384,191 |  |  | 5,159,622 |
Weighted average number of common shares used in computing dilutive earnings per common share | 195,160,855 |  |  | 195,780,971 |  |  | 192,961,841 |
Earnings per common share |  |  |  |  |
Basic | $ | 1.60 |  |  | $ | 1.62 |  |  | $ | 1.97 |
Diluted | $ | 1.56 |  |  | $ | 1.57 |  |  | $ | 1.91 |

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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=124432515&loc=d3e3550-109257 + Details
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