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Quarterly Operating Results (Unaudited) (Tables) | 12 Months Ended
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Dec. 31, 2015
Quarterly Financial Data [Abstract] |
Schedule of Quarterly Financial Information |
|  | 2015 Quarter Ended
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In thousands, except per share data)
Total revenue |  | $ | 208,888 |  |  | $ | 249,801 |  |  | $ | 238,502 |  |  | $ | 233,799 |
Total operating expenses |  | 187,482 |  |  | 205,637 |  |  | 197,086 |  |  | 195,511 |
Operating income |  | $ | 21,406 |  |  | $ | 44,164 |  |  | $ | 41,416 |  |  | $ | 38,288 |
Net income |  | $ | 10,641 |  |  | $ | 24,822 |  |  | $ | 24,464 |  |  | $ | 25,703 |
Basic earnings per share |  | $ | 0.05 |  |  | $ | 0.12 |  |  | $ | 0.12 |  |  | $ | 0.14 |
Diluted earnings per share |  | $ | 0.05 |  |  | $ | 0.12 |  |  | $ | 0.12 |  |  | $ | 0.14 |
|  | 2014 Quarter Ended
|  | March 31 |  | June 30 |  | September 30 |  | December 31
|  | (In thousands, except per share data)
Total revenue |  | $ | 190,084 |  |  | $ | 229,934 |  |  | $ | 229,217 |  |  | $ | 223,627 |
Total operating expenses |  | 180,022 |  |  | 174,897 |  |  | 191,045 |  |  | 189,431 |
Operating income |  | $ | 10,062 |  |  | $ | 55,037 |  |  | $ | 38,172 |  |  | $ | 34,196 |
Net income |  | $ | 4,037 |  |  | $ | 51,916 |  |  | $ | 43,808 |  |  | $ | 63,616 |
Basic earnings per share |  | $ | 0.02 |  |  | $ | 0.27 |  |  | $ | 0.22 |  |  | $ | 0.32 |
Diluted earnings per share |  | $ | 0.02 |  |  | $ | 0.26 |  |  | $ | 0.22 |  |  | $ | 0.32 |

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and 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=51825399&loc=d3e1280-108306 + Details
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