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Summarized Quarterly Financial Data (Unaudited) | 12 Months Ended
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Dec. 31, 2017
Summarized Quarterly Financial Data (Unaudited) [Abstract] |
Summarized Quarterly Financial Data (Unaudited) | 14. Summarized Quarterly Financial Data (Unaudited) Quarterly financial information for 2016 and 2017 is as follows (in thousands except per share data):
|  | 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 |
|  | Quarter |
2017 |  | First |  | Second |  | Third |  | Fourth |
Revenues |  | $ | 114,912 |  | $ | 112,720 |  | $ | 108,512 |  | $ | 118,707 |
Income from operations |  |  | 18,443 |  |  | 13,854 |  |  | 8,224 |  |  | 11,688 |
Net income (loss) |  |  | 10,578 |  |  | 10,302 |  |  | 6,227 |  |  | (6,495) |
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 1.00 |  | $ | 0.96 |  | $ | 0.58 |  | $ | (0.61) |
Diluted |  | $ | 0.95 |  | $ | 0.92 |  | $ | 0.56 |  | $ | (0.61) |

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- References No definition available. + Details
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- Definition The entire disclosure for quarterly financial data. Includes, but is not limited to, tabular presentation of financial information for fiscal quarters, effect of year-end adjustments, and an explanation of matters or transactions that affect comparability of the information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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