Property And Equipment (Construction-In-Progress Balance) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Balance	$ 3,478
Balance	3,185
Capitalized interest	1,300
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance	64,011
Additions during the period	12,041	[1]
Completed during the period	(4,024)
Foreign currency translation	103
Balance	72,131
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance	55,634
Additions during the period	7,724	[1]
Completed during the period
Foreign currency translation	(1)
Balance	63,357
Operating And Investing Properties [Member] | Newmarket Property Development [Member]
Property, Plant and Equipment [Line Items]
Balance	9
Additions during the period	4	[1]
Completed during the period
Foreign currency translation
Balance	13
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance	5,571
Additions during the period	234	[1]
Completed during the period
Foreign currency translation	94
Balance	5,899
Operating And Investing Properties [Member] | Cinema Developments And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balance	1,664
Additions during the period	3,551	[1]
Completed during the period	(3,997)
Foreign currency translation	4
Balance	1,222
Operating And Investing Properties [Member] | Other Real Estate Projects [Member]
Property, Plant and Equipment [Line Items]
Balance	1,133
Additions during the period	528	[1]
Completed during the period	(27)
Foreign currency translation	6
Balance	$ 1,640

[1] Includes capitalized interest of $1.3 million for the quarter ended March 31, 2019.