Identified Intangible Assets and Liabilities (Schedule of Identified Intangible Assets and Intangible Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross amount	$ 249,276	$ 252,081
Accumulated amortization	(99,663)	(97,186)
Total, net	149,613	154,895
Identified intangible liabilities (included in deferred revenue):
Gross amount	255,303	256,065
Accumulated amortization	(213,558)	(212,245)
Total, net	$ 41,745	$ 43,820