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Equity Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] | Our components of Accumulated other comprehensive income are as follows:
| Foreign Currency Translation Adjustment |  | Unrealized Gains and Losses |  | Accumulated Other Comprehensive (Loss) Income
| (In thousands)
Balance at December 31, 2014 | $ | 59,414 |  |  | $ | — |  |  | $ | 59,414 |
Activity in 2015 | (53,250 | ) |  | — |  |  | (53,250 | )
Net unrealized losses associated with available-for-sale securities of the trusts, net of taxes | — |  |  | (85,140 | ) |  | (85,140 | )
Reclassification of net unrealized losses activity attributable to the Deferred receipts held in trust and Care trusts’ corpus, net of taxes | — |  |  | 85,140 |  |  | 85,140 |
Balance at December 31, 2015 | $ | 6,164 |  |  | $ | — |  |  | $ | 6,164 |
Activity in 2016 | 10,328 |  |  | — |  |  | 10,328 |
Net unrealized gains associated with available-for-sale securities of the trusts, net of taxes |  |  |  | 120,573 |  |  | 120,573 |
Reclassification of net unrealized gains activity attributable to the Deferred receipts held in trust and Care trusts’ corpus, net of taxes | — |  |  | (120,573 | ) |  | (120,573 | )
Balance at December 31, 2016 | $ | 16,492 |  |  | $ | — |  |  | $ | 16,492 |
Activity in 2017 | 25,451 |  |  | — |  |  | 25,451 |
Net unrealized gains associated with available-for-sale securities of the trusts, net of taxes | — |  |  | 243,677 |  |  | 243,677 |
Reclassification of net unrealized gains activity attributable to the Deferred receipts held in trust and Care trusts’ corpus, net of taxes | — |  |  | (243,677 | ) |  | (243,677 | )
Balance at December 31, 2017 | $ | 41,943 |  |  | $ | — |  |  | $ | 41,943 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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