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Unaudited Quarterly Financial Results (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Unaudited Quarterly Financial Information |
|  | Quarter Ended |  | Year Ended Dec. 31,
2016 |  | Mar. 31, |  | June 30, |  | Sept. 30, |  | Dec. 31,(1) |
|  | (in thousands, except per share amounts) |  |
Revenues |  | $ | 582,040 |  |  | $ | 608,088 |  |  | $ | 629,401 |  |  | $ | 620,884 |  |  | $ | 2,440,413 |
Gross profit |  | 187,782 |  |  | 202,086 |  |  | 207,120 |  |  | 198,195 |  |  | 795,183 |
Income from continuing operations |  | 17,348 |  |  | 26,013 |  |  | 29,775 |  |  | 24,060 |  |  | 97,196 |
Income from discontinued operations, net of income taxes |  | 53 |  |  | (9 | ) |  | (7 | ) |  | (32 | ) |  | 5 |
Net income |  | $ | 17,401 |  |  | $ | 26,004 |  |  | $ | 29,768 |  |  | $ | 24,028 |  |  | $ | 97,201 |
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.33 |  |  | $ | 0.49 |  |  | $ | 0.56 |  |  | $ | 0.45 |  |  | $ | 1.83 |
Discontinued operations |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net income |  | $ | 0.33 |  |  | $ | 0.49 |  |  | $ | 0.56 |  |  | $ | 0.45 |  |  | $ | 1.83 |
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.32 |  |  | $ | 0.48 |  |  | $ | 0.55 |  |  | $ | 0.45 |  |  | $ | 1.81 |
Discontinued operations |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Net income |  | $ | 0.32 |  |  | $ | 0.48 |  |  | $ | 0.55 |  |  | $ | 0.45 |  |  | $ | 1.81 |
|  | Quarter Ended |  | Year Ended Dec. 31,
2015 |  | Mar. 31, |  | June 30, |  | Sept. 30, |  | Dec. 31, |
|  | (in thousands, except per share amounts) |  |
Revenues |  | $ | 430,045 |  |  | $ | 485,323 |  |  | $ | 572,123 |  |  | $ | 577,517 |  |  | $ | 2,065,008 |
Gross profit |  | 135,875 |  |  | 158,534 |  |  | 191,404 |  |  | 192,932 |  |  | 678,745 |
Income from continuing operations |  | 13,023 |  |  | 14,335 |  |  | 24,891 |  |  | 19,173 |  |  | 71,422 |
Income from discontinued operations, net of income taxes |  | 26,112 |  |  | (83 | ) |  | 34 |  |  | 165 |  |  | 26,228 |
Net income |  | $ | 39,135 |  |  | $ | 14,252 |  |  | $ | 24,925 |  |  | $ | 19,338 |  |  | $ | 97,650 |
Basic earnings per common share: |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.25 |  |  | $ | 0.28 |  |  | $ | 0.47 |  |  | $ | 0.36 |  |  | $ | 1.37 |
Discontinued operations |  | 0.51 |  |  | (0.01 | ) |  | — |  |  | 0.01 |  |  | 0.50 |
Net income |  | $ | 0.76 |  |  | $ | 0.27 |  |  | $ | 0.47 |  |  | $ | 0.37 |  |  | $ | 1.87 |
Diluted earnings per common share: |  |  |  |  |  |  |  |  |  |
Continuing operations |  | $ | 0.25 |  |  | $ | 0.27 |  |  | $ | 0.47 |  |  | $ | 0.36 |  |  | $ | 1.35 |
Discontinued operations |  | 0.50 |  |  | — |  |  | — |  |  | — |  |  | 0.49 |
Net income |  | $ | 0.75 |  |  | $ | 0.27 |  |  | $ | 0.47 |  |  | $ | 0.36 |  |  | $ | 1.84 |
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(1) | The fourth quarter of 2016 includes out of period adjustments of $5.6 million for costs of services that were understated in prior quarters. As a result, the fourth quarter of 2016 costs of services are overstated by $5.6 million and gross profit, net income and diluted earnings per common share are understated by $5.6 million, $3.4 million and $0.06, respectively. Prior periods were not revised, as the impact on prior periods is immaterial. These adjustments were the cumulative effect of the immaterial misstatements spanning the previous six quarters. Of the total adjustments, $2.8 million related to 2015.

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=68076893&loc=d3e1280-108306 + Details
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