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Divestiture Related Activities Divestiture Related Activities Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2017
Divestiture-Related Activities [Abstract] |
Gains (Losses) on Divestitures and Impairment Charges [Table Text Block] | As divestitures occur in the normal course of business, gains or losses on the sale of such locations are recognized in the income statement line item Gains (losses) on divestitures and impairment charges, net, which consist of the following for the years ended December 31:
| 2017 |  | 2016 |  | 2015
| (In thousands)
Gains on divestitures, net | $ | 29,053 |  |  | $ | 7,829 |  |  | $ | 13,363 |
Impairment losses | (22,038 | ) |  | (34,648 | ) |  | (6,841 | )
Gains (losses) on divestitures and impairment charges, net | $ | 7,015 |  |  | $ | (26,819 | ) |  | $ | 6,522 |
Schedule of Income from Discontinued Operations [Table Text Block] |
| 2017 |  | 2016 |  | 2015
| (In thousands)
Gains on divestitures, net | $ | 29,053 |  |  | $ | 7,829 |  |  | $ | 13,363 |
Impairment losses | (22,038 | ) |  | (34,648 | ) |  | (6,841 | )
Gains (losses) on divestitures and impairment charges, net | $ | 7,015 |  |  | $ | (26,819 | ) |  | $ | 6,522 |

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- Definition Divestiture-Related Activities [Abstract] + References No definition available. + Details
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- Definition Schedule of Gains (Losses) on Divestitures and Impairment Charges which shows the expense for gains and losses, net and for impairment charges separately + References No definition available. + Details
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- Definition Schedule of Income from Discontinued Operations [Table Text Block] + References No definition available. + Details
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