Equity Investments (Equity Investment Income Statement Disclosure) (Details) - USD ($) $ in Thousands  | 
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2017  | 
Jun. 30, 2016  | 
Jun. 30, 2017  | 
Jun. 30, 2016  | 
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| Equity Method Investments and Joint Ventures [Abstract] | ||||
| Gross revenue | $ 99,640 | $ 86,732 | $ 194,118 | $ 130,039 | 
| Net loss | $ (67,336) | $ (560) | $ (92,675) | $ (25,868) | 
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- Definition The amount of net income (loss) reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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