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Selected Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Data | The following tables contain unaudited Statement of Operations information for each quarter of 2016 and 2015. The Company believes that the following information reflects all normal recurring adjustments. During the fourth quarter of 2016, the Company reversed the accrual for potential future payments in connection with the departure from the Company of two executives in connection with an executive management reorganization in January 2016, which resulted in a $3.4 million increase in net income. The operating results for any quarter are not necessarily indicative of results for any future period.
|  | Quarter Ended |  |  |  |  |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |  |  | Year |
|  | (in thousands, except per share data) |
2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 119,015 |  |  | $ | 123,142 |  |  | $ | 129,896 |  |  | $ | 140,108 |  |  | $ | 512,161 |
Gross profit |  | $ | 96,192 |  |  | $ | 99,041 |  |  | $ | 106,961 |  |  | $ | 116,820 |  |  | $ | 419,014 |
Net income |  | $ | 14,272 |  |  | $ | 18,884 |  |  | $ | 26,628 |  |  | $ | 31,124 |  |  | $ | 90,908 |
Earnings per share:(1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.25 |  |  | $ | 1.65 |  |  | $ | 2.33 |  |  | $ | 2.72 |  |  | $ | 7.96 |
Diluted |  | $ | 1.24 |  |  | $ | 1.64 |  |  | $ | 2.31 |  |  | $ | 2.69 |  |  | $ | 7.89 |
|  | Quarter Ended |  |  |  |  |
|  | March 31 |  |  | June 30 |  |  | September 30 |  |  | December 31 |  |  | Year |
|  | (in thousands, except per share data) |
2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  | $ | 123,871 |  |  | $ | 132,940 |  |  | $ | 129,536 |  |  | $ | 143,522 |  |  | $ | 529,869 |
Gross profit |  | $ | 96,773 |  |  | $ | 107,028 |  |  | $ | 104,852 |  |  | $ | 120,108 |  |  | $ | 428,761 |
Net income |  | $ | 20,460 |  |  | $ | 22,467 |  |  | $ | 23,893 |  |  | $ | 39,111 |  |  | $ | 105,931 |
Earnings per share:(1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.81 |  |  | $ | 1.98 |  |  | $ | 2.10 |  |  | $ | 3.44 |  |  | $ | 9.33 |
Diluted |  | $ | 1.79 |  |  | $ | 1.95 |  |  | $ | 2.06 |  |  | $ | 3.38 |  |  | $ | 9.18 |
(1) | The sum of the basic and diluted earnings per share for the four quarters may differ from annual earnings per share as the weighted-average shares outstanding are computed independently for each of the quarters presented.

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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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