Property And Equipment (Construction-In-Progress Balance) (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2020	Sep. 30, 2020
Property, Plant and Equipment [Line Items]
Balance			$ 5,484
Balance		$ 10,381	10,381
Capitalized interest		700	2,400
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance			93,162
Additions during the period	[1]		13,649
Completed during the period			(90,429)
Foreign currency translation			11
Balance		16,393	16,393
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance			81,934
Additions during the period	[1]		6,201
Completed during the period			(88,135)
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance			6,364
Additions during the period	[1]		419
Foreign currency translation			(110)
Balance		6,673	6,673
Operating And Investing Properties [Member] | Cinema Developments And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balance			3,032
Additions during the period	[1]		5,723
Completed during the period			(1,415)
Foreign currency translation			94
Balance		7,434	7,434
Operating And Investing Properties [Member] | Other Real Estate Projects [Member]
Property, Plant and Equipment [Line Items]
Balance			1,832
Additions during the period	[1]		1,306
Completed during the period			(879)
Foreign currency translation			27
Balance		$ 2,286	$ 2,286

[1] Includes capitalized interest of $0.7 million and $2.4 million for the quarter and nine months ended September 30, 2020