Notes Payable - Other Debt Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt Disclosure [Abstract]
Notes payable, fair value	$ 2,200,000		$ 2,200,000		$ 2,300,000
Total interest incurred	18,075	$ 17,952	36,595	$ 39,165
Interest capitalized	(1,419)	(3,959)	(2,731)	(9,268)
Total interest expense	$ 16,656	$ 13,993	$ 33,864	$ 29,897