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Summarized Quarterly Financial Data (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2016
Summarized Quarterly Financial Data (Unaudited) [Abstract] |
Schedule of quarterly financial information | Quarterly financial information for 2015 and 2016 is as follows (in thousands except per share data):
|  | 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 |
|  | Quarter |
2016 |  | First |  | Second |  | Third |  | Fourth |
Revenues |  | $ | 111,166 |  | $ | 108,487 |  | $ | 102,156 |  | $ | 119,279 |
Income from operations |  |  | 20,092 |  |  | 12,896 |  |  | 4,830 |  |  | 19,654 |
Net income |  |  | 12,420 |  |  | 7,786 |  |  | 2,878 |  |  | 11,718 |
Net income per share: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.17 |  | $ | 0.73 |  | $ | 0.27 |  | $ | 1.10 |
Diluted |  | $ | 1.15 |  | $ | 0.72 |  | $ | 0.27 |  | $ | 1.07 |

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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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