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Income Taxes Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income taxes      
Variance from federal statutory rate due to income (loss) from non-controlling interests, perecent (2.77%) 19.77% (5.12%)
Federal operating loss carryforward $ 0 $ 78,000,000  
Valuation allowance 29,000,000 38,000,000  
State      
Income taxes      
State operating loss carryforward 791,000,000 556,000,000  
Valuation allowance $ 26,000,000 $ 22,000,000