Revenue Recognition (Components of Lease Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from Contract with Customer [Abstract]
Fixed billings	$ 1,277,645	$ 1,292,174	$ 1,531,917
Variable billings	108,850	126,907	199,291
Total contractual operating lease billings	1,386,495	1,419,081	1,731,208
Adjustment for straight-line rents and amortization of acquired below-market leases and other, net	(5,109)	(12,486)	5,739
Less: write-off of straight-line rent and tenant receivables deemed uncollectible	(7,695)	(63,204)	(17,237)
Lease revenues	1,373,691	1,343,391	1,719,710
Disaggregation of Revenue [Line Items]
Write-off of lease receivables deemed uncollectible	7,695	63,204	17,237
Property rentals
Revenue from Contract with Customer [Abstract]
Less: write-off of straight-line rent and tenant receivables deemed uncollectible		(63,204)	(17,237)
Lease revenues	$ 1,354,209	1,323,347	1,589,539
Disaggregation of Revenue [Line Items]
Write-off of lease receivables deemed uncollectible		$ 63,204	$ 17,237