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Selected Quarterly Financial Data | 12 Months Ended
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Dec. 31, 2020
Selected quarterly financial data |
Selected Quarterly Financial Data | 28. Selected quarterly financial data (unaudited) Certain comparative figures have been restated to conform to current presentation. The following is a summary of selected quarterly financial information (unaudited): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Attributable to stockholders
​ | ​ | ​ |  | Operating |  | Net |  | Net |  | Earnings per share
2020 |  | Revenues |  | income |  | income |  | income |  | Basic |  | Diluted
First quarter | ​ | $ | 273,255 | ​ | $ | 34,082 | ​ | $ | 22,829 | ​ | $ | 22,809 | ​ | $ | 0.21 | ​ | $ | 0.21
Second quarter | ​ |  | 389,050 | ​ |  | 88,802 | ​ |  | 53,120 | ​ |  | 53,042 | ​ |  | 0.49 | ​ |  | 0.49
Third quarter | ​ |  | 331,542 | ​ |  | 67,384 | ​ |  | 45,490 | ​ |  | 45,387 | ​ |  | 0.42 | ​ |  | 0.41
Fourth quarter | ​ |  | 383,413 | ​ |  | 72,892 | ​ |  | 48,919 | ​ |  | 48,857 | ​ |  | 0.45 | ​ |  | 0.44
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Attributable to stockholders
​ | ​ | ​ | ​ |  | Operating |  | Net |  | Net |  | Earnings per share
2019 |  | Revenues |  | income |  | income |  | income |  | Basic |  | Diluted
First quarter | ​ | $ | 303,429 | ​ | $ | 33,588 | ​ | $ | 18,172 | ​ | $ | 18,164 | ​ | $ | 0.17 | ​ | $ | 0.17
Second quarter | ​ |  | 393,222 | ​ |  | 77,970 | ​ |  | 54,131 | ​ |  | 54,036 | ​ |  | 0.50 | ​ |  | 0.49
Third quarter | ​ |  | 289,796 | ​ |  | 40,160 | ​ |  | 25,272 | ​ |  | 25,266 | ​ |  | 0.23 | ​ |  | 0.23
Fourth quarter | ​ |  | 332,194 | ​ |  | 71,484 | ​ |  | 51,565 | ​ |  | 51,573 | ​ |  | 0.47 | ​ |  | 0.47
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | Attributable to stockholders
​ | ​ | ​ | ​ |  | Operating |  | Net |  | Net |  | Earnings (loss) per share
2018 |  | Revenues |  | income |  | income (loss) |  | income (loss) |  | Basic |  | Diluted
First quarter | ​ | $ | 260,178 | ​ | $ | 32,873 | ​ | $ | 17,207 | ​ | $ | 17,138 | ​ | $ | 0.16 | ​ | $ | 0.16
Second quarter | ​ |  | 308,530 | ​ |  | 64,795 | ​ |  | 45,727 | ​ |  | 45,717 | ​ |  | 0.42 | ​ |  | 0.42
Third quarter | ​ |  | 245,346 | ​ |  | 31,194 | ​ |  | 23,112 | ​ |  | 23,138 | ​ |  | 0.21 | ​ |  | 0.21
Fourth quarter | ​ |  | 355,972 | ​ |  | 56,327 | ​ |  | 35,460 | ​ |  | 35,486 | ​ |  | 0.33 | ​ |  | 0.32
​

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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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