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Earnings per share attributable to stockholders (Tables) | 3 Months Ended
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Mar. 31, 2021
Earnings per share attributable to stockholders |
Computation of Basic and Diluted Earnings Per Share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net income | ​ | WA | ​ | Per | ​
​ |  | attributable to |  | number |  | share |
Three months ended March 31, 2021 |  | stockholders |  | of shares |  | amount |
Basic | ​ | $ | 28,188 |  | 109,972,997 | ​ | $ | 0.26 | ​
Effect of dilutive securities: | ​ |  | ​ |  | ​ | ​ |  | ​ | ​
Share units | ​ |  | — |  | 579,133 | ​ |  | — | ​
Stock options | ​ |  | — |  | 715,262 | ​ |  | (0.01) | ​
Diluted | ​ | $ | 28,188 |  | 111,267,392 | ​ | $ | 0.25 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Net income | ​ | WA | ​ | Per | ​
​ |  | attributable to |  | number |  | share |
Three months ended March 31, 2020 |  | stockholders |  | of shares |  | amount |
Basic | ​ | $ | 22,809 | ​ | 109,248,880 | ​ | $ | 0.21 | ​
Effect of dilutive securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Share units | ​ | ​ | — | ​ | 586,074 | ​ | ​ | — | ​
Stock options | ​ | ​ | — | ​ | 647,883 | ​ | ​ | — | ​
Diluted | ​ | $ | 22,809 | ​ | 110,482,837 | ​ | $ | 0.21 | ​

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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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