Basis of Presentation and Significant Accounting Policies - Schedule of Interest Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accounting Policies [Abstract]
Interest incurred	$ 18,112	$ 21,293	$ 56,359	$ 62,112
Less: Interest capitalized	18,112	21,293	56,359	62,112
Interest expense, net of amounts capitalized	0	0	0	0
Cash paid for interest	$ 28,374	$ 14,898	$ 55,532	$ 54,576