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Selected Quarterly Financial Information (Unaudited) | 12 Months Ended
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Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract] |
Selected Quarterly Financial Information (Unaudited) | SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) The following table presents selected quarterly financial information:
| Year Ended December 31, 2018
(In thousands, except per share data) | First |  | Second |  | Third |  | Fourth |  | Year
Summary Operating Results: |  |  |  |  |  |  |  |  |
Total revenues | $ | 606,118 |  |  | $ | 616,793 |  |  | $ | 612,196 |  |  | $ | 791,623 |  |  | $ | 2,626,730 |
Operating income | 94,774 |  |  | 96,258 |  |  | 69,568 |  |  | 94,684 |  |  | 355,284 |
Income from continuing operations, net of tax | $ | 41,399 |  |  | $ | 38,598 |  |  | $ | 11,837 |  |  | $ | 22,867 |  |  | $ | 114,701 |
Income from discontinued operations, net of tax | — |  |  | 347 |  |  | — |  |  | — |  |  | 347 |
Net income | $ | 41,399 |  |  | $ | 38,945 |  |  | $ | 11,837 |  |  | $ | 22,867 |  |  | $ | 115,048 |
Basic net income per common share: |  |  |  |  |  |  |  |  |
Continuing operations | $ | 0.36 |  |  | $ | 0.34 |  |  | $ | 0.10 |  |  | $ | 0.21 |  |  | $ | 1.01 |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |  |  | — |
Basic net income per common share | $ | 0.36 |  |  | $ | 0.34 |  |  | $ | 0.10 |  |  | $ | 0.21 |  |  | $ | 1.01 |
Diluted net income per common share: |  |  |  |  |  |  |  |  |
Continuing operations | $ | 0.36 |  |  | $ | 0.34 |  |  | $ | 0.10 |  |  | $ | 0.20 |  |  | $ | 1.00 |
Discontinued operations | — |  |  | — |  |  | — |  |  | — |  |  | — |
Diluted net income per common share | $ | 0.36 |  |  | $ | 0.34 |  |  | $ | 0.10 |  |  | $ | 0.20 |  |  | $ | 1.00 |
| Year Ended December 31, 2017
(In thousands, except per share data) | First |  | Second |  | Third |  | Fourth |  | Year
Summary Operating Results: |  |  |  |  |  |  |  |  |
Total revenues | $ | 610,065 |  |  | $ | 604,124 |  |  | $ | 591,542 |  |  | $ | 595,088 |  |  | $ | 2,400,819 |
Operating income | 94,830 |  |  | 89,554 |  |  | 78,940 |  |  | 80,477 |  |  | 343,801 |
Income from continuing operations, net of tax | $ | 35,076 |  |  | $ | 27,692 |  |  | $ | 23,157 |  |  | $ | 82,073 |  |  | $ | 167,998 |
Income from discontinued operations, net of tax | 375 |  |  | 21,017 |  |  | — |  |  | — |  |  | 21,392 |
Net income | $ | 35,451 |  |  | $ | 48,709 |  |  | $ | 23,157 |  |  | $ | 82,073 |  |  | $ | 189,390 |
Basic net income per common share: |  |  |  |  |  |  |  |  |
Continuing operations | $ | 0.31 |  |  | $ | 0.24 |  |  | $ | 0.20 |  |  | $ | 0.72 |  |  | $ | 1.46 |
Discontinued operations | — |  |  | 0.18 |  |  | — |  |  | — |  |  | 0.19 |
Basic net income per common share | $ | 0.31 |  |  | $ | 0.42 |  |  | $ | 0.20 |  |  | $ | 0.72 |  |  | $ | 1.65 |
Diluted net income per common share: |  |  |  |  |  |  |  |  |
Continuing operations | $ | 0.31 |  |  | $ | 0.24 |  |  | $ | 0.20 |  |  | $ | 0.71 |  |  | $ | 1.45 |
Discontinued operations | — |  |  | 0.18 |  |  | — |  |  | — |  |  | 0.19 |
Diluted net income per common share | $ | 0.31 |  |  | $ | 0.42 |  |  | $ | 0.20 |  |  | $ | 0.71 |  |  | $ | 1.64 |

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -URI http://asc.fasb.org/topic&trid=2126967 + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration