Notes Payable - Other Debt Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Disclosure [Abstract]
Notes payable, fair value	$ 2,200,000		$ 2,200,000		$ 2,300,000
Total interest incurred	18,181	$ 17,780	54,775	$ 56,944
Interest capitalized	(1,472)	(2,722)	(4,202)	(11,989)
Total interest expense	$ 16,709	$ 15,058	$ 50,573	$ 44,955