Notes Payable (Other Debt Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Debt Disclosure [Abstract]
Notes payable, fair value	$ 2,000,000		$ 2,300,000
Total interest incurred	21,213	$ 11,835
Interest capitalized	(5,309)	(1,015)
Total interest expense	$ 15,904	$ 10,820