Property And Equipment (Construction-In-Progress Balance) (Details) - USD ($)		3 Months Ended	9 Months Ended
		Sep. 30, 2017	Sep. 30, 2017
Property, Plant and Equipment [Line Items]
Balance			$ 11,517,000
Balance		$ 19,922,000	19,922,000
Capitalized interest charges		369,000	790,000
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance			28,688,000
Additions during the period	[1]		42,739,000
Completed during the period			(5,787,000)
Foreign currency movements			848,000
Balance		66,488,000	66,488,000
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance			11,412,000
Additions during the period	[1]		13,413,000
Completed during the period
Foreign currency movements
Balance		24,825,000	24,825,000
Operating And Investing Properties [Member] | Newmarket Property Development [Member]
Property, Plant and Equipment [Line Items]
Balance			2,106,000
Additions during the period	[1]		14,492,000
Completed during the period
Foreign currency movements			438,000
Balance		17,036,000	17,036,000
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance			3,510,000
Additions during the period	[1]		883,000
Completed during the period
Foreign currency movements			149,000
Balance		4,542,000	4,542,000
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]		8,810,000
Completed during the period			(1,845,000)
Foreign currency movements			64,000
Balance		14,825,000	14,825,000
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]		5,141,000
Completed during the period			(3,942,000)
Foreign currency movements			197,000
Balance		$ 5,260,000	$ 5,260,000

[1] Includes capitalized interest of $369,000 and $790,000 for the quarter and nine months ended September 30, 2017.