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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2019
Selected Quarterly Financial Data (Unaudited) |
Schedule of quarterly financial information | Quarterly financial information for the years ended December 31, 2019 and 2018 is summarized as follows (in thousands, except per share data):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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 | ​
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2018 |
​ |  | Q1 |  | Q2 |  | Q3 |  | Q4 |
Revenue | ​ | $ | 464,941 | ​ | $ | 535,043 | ​ | $ | 594,536 | ​ | $ | 588,359 | ​
Gross profit | ​ |  | 89,053 | ​ |  | 111,183 | ​ |  | 127,868 | ​ |  | 118,175 | ​
Net income | ​ |  | 16,659 | ​ |  | 32,547 | ​ |  | 38,541 | ​ |  | 25,156 | ​
INCOME PER SHARE: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | 0.45 | ​ | $ | 0.87 | ​ | $ | 1.03 | ​ | $ | 0.68 | ​
Diluted | ​ | $ | 0.44 | ​ | $ | 0.87 | ​ | $ | 1.02 | ​ | $ | 0.67 | ​
(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=118952077&loc=d3e1280-108306 + Details
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