Property And Equipment (Construction-In-Progress Balance) (Details) - USD ($)		3 Months Ended	6 Months Ended
		Jun. 30, 2018	Jun. 30, 2018
Property, Plant and Equipment [Line Items]
Balance			$ 26,000,000
Balance		$ 10,494,000	10,494,000
Capitalized interest charges		800,000	1,100,000
Operating And Investing Properties [Member]
Property, Plant and Equipment [Line Items]
Balance			60,329,000
Additions during the period	[1]		25,217,000
Completed during the period			(26,522,000)
Foreign currency translation			(660,000)
Balance		58,364,000	58,364,000
Operating And Investing Properties [Member] | Union Square Development [Member]
Property, Plant and Equipment [Line Items]
Balance			29,223,000
Additions during the period	[1]		13,884,000
Completed during the period
Foreign currency translation
Balance		43,107,000	43,107,000
Operating And Investing Properties [Member] | Newmarket Property Development [Member]
Property, Plant and Equipment [Line Items]
Balance			370,000
Additions during the period	[1]		545,000
Completed during the period			(637,000)
Foreign currency translation			(22,000)
Balance		256,000	256,000
Operating And Investing Properties [Member] | Courtenay Central Development [Member]
Property, Plant and Equipment [Line Items]
Balance			4,676,000
Additions during the period	[1]		38,000
Completed during the period
Foreign currency translation			(217,000)
Balance		4,497,000	4,497,000
Operating And Investing Properties [Member] | Cinema Developments And Improvements [Member]
Property, Plant and Equipment [Line Items]
Balance			19,015,000
Additions during the period	[1]		8,206,000
Completed during the period			(21,304,000)
Foreign currency translation			(81,000)
Balance		5,836,000	5,836,000
Operating And Investing Properties [Member] | Other Real Estate Projects [Member]
Property, Plant and Equipment [Line Items]
Balance			7,045,000
Additions during the period	[1]		2,544,000
Completed during the period			(4,581,000)
Foreign currency translation			(340,000)
Balance		$ 4,668,000	$ 4,668,000

[1] Includes capitalized interest of $800,000 and $1.1 million for the quarter and six months ended June 30, 2018, respectively.