Lease Income - Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Fixed lease payments	$ 164,679	$ 194,224
Variable lease payments	25,279	27,168
Total lease payments	189,958	221,392
Amortization of acquired above and below-market leases	(1,869)	1,239
Total rental revenue	188,089	222,631
Sublease Income	65,800	66,300
Interest income	$ 1,101	$ 0