Notes Payable - Other Debt Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Debt Disclosure [Abstract]
Notes payable, fair value	$ 2,300,000		$ 2,300,000
Total interest incurred	18,520	$ 21,213
Interest capitalized	(1,312)	(5,309)
Total interest expense	$ 17,208	$ 15,904