Property And Equipment (Construction-In-Progress Balance) (Details)	3 Months Ended
	Mar. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Balance	$ 11,517,000
Balance	11,805,000
Capitalized interest charges	155,000
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance	28,688,000
Additions during the quarter	7,753,000	[1]
Completed during the quarter	(1,342,000)
Foreign currency movements	246,000
Balance	35,345,000
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance	11,412,000
Additions during the quarter	4,259,000	[1]
Completed during the quarter
Foreign currency movements
Balance	15,671,000
Operating And Investing Properties [Member] | Newmarket Property Development [Member]
Property, Plant and Equipment [Line Items]
Balance	2,106,000
Additions during the quarter	1,714,000	[1]
Completed during the quarter
Foreign currency movements	131,000
Balance	3,951,000
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance	3,510,000
Additions during the quarter	232,000	[1]
Completed during the quarter
Foreign currency movements	20,000
Balance	3,762,000
Operating And Investing Properties [Member] | Cinema Developments And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balance	7,796,000
Additions during the quarter	87,000	[1]
Completed during the quarter	(959,000)
Foreign currency movements	20,000
Balance	6,944,000
Operating And Investing Properties [Member] | Other Real Estate Projects [Member]
Property, Plant and Equipment [Line Items]
Balance	3,864,000
Additions during the quarter	1,461,000	[1]
Completed during the quarter	(383,000)
Foreign currency movements	75,000
Balance	$ 5,017,000

[1] Includes capitalized interest of $155,000 for the quarter ended March 31, 2017.