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Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |
Quarterly Financial Data (Unaudited) |
14. | Quarterly Financial Data (Unaudited)
|  | Quarter ended |
|  | March 31 |  | June 30 |  |  |  | Sept. 30 |  |  |  | Dec. 31 |
|  | (in thousands, except per share amounts) |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 699,479 |  |  | $ | 627,838 |  |  |  |  | $ | 626,286 |  |  |  |  | $ | 650,011 |  |
Gross profit |  | 129,860 |  |  | 104,219 |  |  |  |  | 106,743 |  |  |  |  | 97,045 |  |
Operating income |  | 23,520 |  | (1) | 12,217 |  | (2) |  | 19,936 |  |  |  |  | 10,026 |  | (3)
Net income |  | 13,787 |  |  | 7,314 |  |  |  |  | 11,950 |  |  |  |  | 6,339 |  |
Basic net income per share |  | 0.54 |  |  | 0.29 |  |  |  |  | 0.48 |  |  |  |  | 0.26 |  |
Diluted net income per share |  | 0.54 |  |  | 0.29 |  |  |  |  | 0.48 |  |  |  |  | 0.26 |  |
2014 |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 636,999 |  |  | $ | 564,621 |  |  |  |  | $ | 560,303 |  |  |  |  | $ | 595,865 |  |
Gross profit |  | 106,176 |  |  | 95,453 |  |  |  |  | 100,817 |  |  |  |  | 101,359 |  |
Operating income |  | 16,591 |  |  | 3,414 |  | (4) |  | 14,460 |  |  |  |  | 13,009 |  | (5)
Net income |  | 9,564 |  |  | 1,891 |  |  |  | 8,385 |  |  |  |  | 8,164 |  |
Basic net income per share |  | 0.37 |  |  | 0.07 |  |  |  |  | 0.33 |  |  |  |  | 0.27 |  | (6)
Diluted net income per share |  | 0.37 |  |  | 0.07 |  |  |  |  | 0.33 |  |  |  |  | 0.27 |  | (6)
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(1) | Includes non-cash impairment and other charges in the first quarter of 2015 of $9.8 million. Please read Note 6, “Other Asset Impairments,” for additional information.
(2) | Includes non-cash impairment and other charges in the second quarter of 2015 of $1.3 million. Please read Note 6, “Other Asset Impairments,” for additional information.
(3) | Includes a reduction to non-cash impairment and other charges in the fourth quarter of 2015 of $0.6 million. Please read Note 6, “Other Asset Impairments,” for additional information.
(4) | Includes a non-cash impairment charge in the first quarter of 2014 of $2.5 million. Please read Note 5, “Goodwill and Other Intangible Assets,” for additional information.
(5) | Includes a $1.2 million non-cash charge in the fourth quarter of 2014. Please read Note 1, “Accounting Policies,” for additional information.
(6) | Includes the impact of dividends exceeding earnings under the two-class method, resulting in a $0.05 earnings per share decrease in the fourth quarter of 2014. Please read Note 11, “Net Income Per Share,” for additional information.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e765-108305 Reference 2: 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=51825399&loc=d3e1280-108306 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51655806&loc=d3e725-108305 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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