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Quarterly Operating Results (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2017
Quarterly Financial Data [Abstract] |
Schedule of Quarterly Financial Information |
|  | 2017 Quarter Ended
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In thousands, except per share data)
Total revenue |  | $ | 196,210 |  |  | $ | 243,272 |  |  | $ | 223,486 |  |  | $ | 207,037 |
Total operating expenses |  | 176,914 |  |  | 192,621 |  |  | 189,168 |  |  | 171,519 |
Operating income |  | $ | 19,296 |  |  | $ | 50,651 |  |  | $ | 34,318 |  |  | $ | 35,518 |
Net income |  | $ | 8,887 |  |  | $ | 36,595 |  |  | $ | 21,623 |  |  | $ | 24,772 |
Basic earnings per share |  | $ | 0.04 |  |  | $ | 0.18 |  |  | $ | 0.11 |  |  | $ | 0.12 |
Diluted earnings per share |  | $ | 0.04 |  |  | $ | 0.18 |  |  | $ | 0.11 |  |  | $ | 0.12 |
|  | 2016 Quarter Ended
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In thousands, except per share data)
Total revenue |  | $ | 213,034 |  |  | $ | 256,664 |  |  | $ | 220,239 |  |  | $ | 206,621 |
Total operating expenses |  | 188,723 |  |  | 198,559 |  |  | 178,936 |  |  | 172,870 |
Operating income |  | $ | 24,311 |  |  | $ | 58,105 |  |  | $ | 41,303 |  |  | $ | 33,751 |
Net income |  | $ | 16,778 |  |  | $ | 44,175 |  |  | $ | 29,937 |  |  | $ | 23,906 |
Basic earnings per share |  | $ | 0.08 |  |  | $ | 0.22 |  |  | $ | 0.15 |  |  | $ | 0.12 |
Diluted earnings per share |  | $ | 0.08 |  |  | $ | 0.22 |  |  | $ | 0.15 |  |  | $ | 0.12 |

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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=84173487&loc=d3e1280-108306 + Details
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