Property And Equipment (Construction-In-Progress Balance) (Details) - USD ($)		3 Months Ended	6 Months Ended
		Jun. 30, 2017	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Balance			$ 11,517,000
Balance		$ 13,710,000	13,710,000
Capitalized interest charges		266,000	421,000
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance			28,688,000
Additions during the period	[1]		23,266,000
Completed during the period			(4,090,000)
Foreign currency movements			715,000
Balance		48,579,000	48,579,000
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance			11,412,000
Additions during the period	[1]		8,912,000
Completed during the period
Foreign currency movements
Balance		20,324,000	20,324,000
Operating And Investing Properties [Member] | Newmarket Property Development [Member]
Property, Plant and Equipment [Line Items]
Balance			2,106,000
Additions during the period	[1]		7,531,000
Completed during the period
Foreign currency movements			278,000
Balance		9,915,000	9,915,000
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance			3,510,000
Additions during the period	[1]		746,000
Completed during the period
Foreign currency movements			209,000
Balance		4,465,000	4,465,000
Operating And Investing Properties [Member] | Cinema Developments And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balance			7,796,000
Additions during the period	[1]		2,722,000
Completed during the period			(1,635,000)
Foreign currency movements			51,000
Balance		8,934,000	8,934,000
Operating And Investing Properties [Member] | Other Real Estate Projects [Member]
Property, Plant and Equipment [Line Items]
Balance			3,864,000
Additions during the period	[1]		3,355,000
Completed during the period			(2,455,000)
Foreign currency movements			177,000
Balance		$ 4,941,000	$ 4,941,000

[1] Includes capitalized interest of $266,000 and $421,000 for the quarter and six months ended June 30, 2017.