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Selected Quarterly Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2020
Selected Quarterly Financial Data |
Schedule of quarterly financial information | Quarterly financial information for the years ended December 31, 2020 and 2019 is summarized as follows (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2020 |
​ |  | Q1 |  | Q2 |  | Q3 |  | Q4 |
Revenue | ​ | $ | 700,131 | ​ | $ | 743,468 | ​ | $ | 714,099 | ​ | $ | 698,961 | ​
Gross profit | ​ |  | 117,093 | ​ |  | 145,695 | ​ |  | 147,196 | ​ |  | 136,999 | ​
Net income | ​ |  | 17,716 | ​ |  | 39,495 | ​ |  | 50,088 | ​ |  | 42,840 | ​
INCOME PER SHARE: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.48 | ​ | $ | 1.08 | ​ | $ | 1.37 | ​ | $ | 1.18 | ​
Diluted | ​ | $ | 0.48 | ​ | $ | 1.08 | ​ | $ | 1.36 | ​ | $ | 1.17 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2019 |
​ |  | Q1 |  | Q2 |  | Q3 |  | Q4 |
Revenue | ​ | $ | 538,473 | ​ | $ | 650,302 | ​ | $ | 706,918 | ​ | $ | 719,584 | ​
Gross profit (1) | ​ |  | 106,665 | ​ |  | 120,016 | ​ |  | 142,702 | ​ |  | 132,560 | ​
Net income | ​ |  | 19,866 | ​ |  | 24,173 | ​ |  | 36,233 | ​ |  | 34,052 | ​
INCOME PER SHARE: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.54 | ​ | $ | 0.65 | ​ | $ | 0.98 | ​ | $ | 0.93 | ​
Diluted | ​ | $ | 0.53 | ​ | $ | 0.65 | ​ | $ | 0.98 | ​ | $ | 0.92 | ​
​
| (1) | In the fourth quarter of 2019, we recorded a $4.8 million gain due to insurance proceeds we received in the fourth quarter related to the ransomware incident that occurred in April 2019.

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- Definition Tabular disclosure of quarterly financial data. Includes, but is not limited to, financial information for fiscal quarters, cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121640914&loc=d3e1280-108306 + Details
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