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Summary of Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Consolidated Statements of Income by Quarter | The following table summarizes our results of operations as presented in the accompanying consolidated statements of income by quarter for 2018 and 2017:
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter
| (In thousands, except per share data) |  |  |  |  |  |
Year Ended December 31, 2018 |  |  |  |  |  |  |
Total revenues (1) | $ | 2,400,773 |  | $ | 2,505,749 |  | $ | 2,470,849 |  | $ | 2,574,259
Gross profit (1) | $ | 352,499 |  | $ | 362,375 |  | $ | 360,536 |  | $ | 370,715
Net income (loss) (2) | $ | (2,194) |  | $ | 16,905 |  | $ | 15,118 |  | $ | 21,821
Earnings (loss) per common share - Basic (2) (3) | $ | (0.05) |  | $ | 0.40 |  | $ | 0.35 |  | $ | 0.51
Earnings (loss) per common share - Diluted (2) (3) | $ | (0.05) |  | $ | 0.39 |  | $ | 0.35 |  | $ | 0.51
Year Ended December 31, 2017 |  |  |  |  |  |  |
Total revenues (1) | $ | 2,287,822 |  | $ | 2,405,746 |  | $ | 2,505,701 |  | $ | 2,667,939
Gross profit (1) | $ | 350,346 |  | $ | 360,618 |  | $ | 362,622 |  | $ | 384,090
Net income (loss) (2) | $ | (541) |  | $ | 12,132 |  | $ | 19,440 |  | $ | 61,952
Earnings (loss) per common share - Basic (2) (3) | $ | (0.01) |  | $ | 0.27 |  | $ | 0.45 |  | $ | 1.43
Earnings (loss) per common share - Diluted (2) (3) | $ | (0.01) |  | $ | 0.27 |  | $ | 0.44 |  | $ | 1.42
(1) Results are for continuing operations. (2) Results include both continuing operations and discontinued operations. (3) The sum of net income per common share for the quarters may not equal the full year amount due to weighted average common shares being calculated on a quarterly versus annual basis.

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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=109225645&loc=d3e1280-108306 + Details
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