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Amount of short-term and long-term debt and lease obligation.

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The percentage of ownership of a joint venture.

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Related Parties (Schedule of related party transactions) (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 11, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Real Estate Investment Property, at Cost		$ 4,246,334	$ 4,145,249
Property		3,084,364	3,034,574
Unamortized lease costs		174,152	148,479
Other, net		205,074	188,004
Liabilities
Debt, net		(1,838,419)	(1,732,338)
Other, net		(217,489)	(217,770)
Gain on sale of property		$ 65,402	$ 189,914	$ 207,865
Partnership interest \| Village Plaza at Bunker Hill
Related Party Transaction [Line Items]
Ownership of joint venture percentage	42.25%	42.25%
Assets
Real Estate Investment Property, at Cost	$ 140,596
Unamortized lease costs	41,328
Other, net	1,741
Liabilities
Debt, net	(73,088)
Other, net	(4,690)
Total net assets	105,887
Partnership interest \| Gain on Sale Property \| Village Plaza at Bunker Hill
Liabilities
Gain on sale of property	$ 32,453
Unconsolidated joint venture
Related Party Transaction [Line Items]
Ownership percentage	57.75%	57.75%