Leases - Schedule of Rental Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation Of Revenue [Abstract]
Fixed rental revenues	$ 153,065	$ 163,123	$ 467,609	$ 484,587
Variable rental revenues	12,355	17,992	37,225	45,913
Total rental revenues	$ 165,420	$ 181,115	$ 504,834	$ 530,500