Basis of Presentation and Significant Accounting Policies - Schedule of Interest Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Interest incurred	$ 23,910	$ 22,808	$ 47,990	$ 42,066
Less: Interest capitalized	23,910	22,808	47,990	42,066
Interest expense, net of amounts capitalized	0	0	0	0
Cash paid for interest	$ 5,613	$ 1,611	$ 46,398	$ 31,101