Revenue Recognition (Components of Lease Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Fixed billings	$ 329,251	$ 309,860
Variable billings	32,974	31,649
Total contractual operating lease billings	362,225	341,509
Adjustment for straight-line rents and amortization of acquired below-market leases and other, net	20,806	(5,781)
Less: write-off of straight-line rent and tenant receivables deemed uncollectible	0	(3,670)
Lease revenues	$ 383,031	$ 332,058