Basis of Presentation and Summary of Significant Accounting Policies - Lease Income for Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Fixed lease income	$ 213,416	$ 215,581
Variable lease income	13,615	14,144
Total lease income	$ 227,031	$ 229,725