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Summarized Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2015
Summarized Quarterly Financial Data (Unaudited) [Abstract] |
Summarized Quarterly Financial Data (Unaudited) | 13. Summarized Quarterly Financial Data (Unaudited) Quarterly financial information for 2014 and 2015 is as follows (in thousands except per share data):
|  |  |  | Quarter
2014 |  |  |  | First |  |  |  | Second |  |  |  | Third |  |  |  | Fourth
Revenues |  |  |  | $ | 116,468 |  |  |  | $ | 112,747 |  |  |  | $ | 100,756 |  |  |  | $ | 116,070
Income from operations |  |  |  |  | 25,909 |  |  |  |  | 23,998 |  |  |  |  | 9,216 |  |  |  |  | 22,624
Net income |  |  |  |  | 14,783 |  |  |  |  | 13,677 |  |  |  |  | 4,953 |  |  |  |  | 12,943
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  | $ | 1.40 |  |  |  | $ | 1.29 |  |  |  | $ | 0.47 |  |  |  | $ | 1.22
Diluted |  |  |  | $ | 1.40 |  |  |  | $ | 1.29 |  |  |  | $ | 0.46 |  |  |  | $ | 1.21
|  |  |  | Quarter
2015 |  |  |  | First |  |  |  | Second |  |  |  | Third |  |  |  | Fourth
Revenues |  |  |  | $ | 111,885 |  |  |  | $ | 109,750 |  |  |  | $ | 99,142 |  |  |  | $ | 113,660
Income from operations |  |  |  |  | 19,859 |  |  |  |  | 20,929 |  |  |  |  | 7,254 |  |  |  |  | 21,656
Net income |  |  |  |  | 11,385 |  |  |  |  | 11,874 |  |  |  |  | 3,723 |  |  |  |  | 13,041
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  | $ | 1.08 |  |  |  | $ | 1.12 |  |  |  | $ | 0.35 |  |  |  | $ | 1.23
Diluted |  |  |  | $ | 1.06 |  |  |  | $ | 1.11 |  |  |  | $ | 0.35 |  |  |  | $ | 1.21

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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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