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Stockholders' Equity - Common Stock (Details) - USD ($)
$ in Thousands, shares in Millions
9 Months Ended 12 Months Ended 72 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Sep. 30, 2016
Class of Stock [Line Items]        
Value of common stock issued $ 296   $ 697,491  
Common Stock        
Class of Stock [Line Items]        
Number of shares issued (shares) 0.1 43.9   173.4
Value of common stock issued $ 800 $ 443,500   $ 1,700,000