Non-controlling Interests (Components Of Income Attributable To Non-controlling Interest) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Noncontrolling Interest [Line Items]
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries	$ (185)	$ (37)	$ (266)	$ (53)
Australia Country Cinemas [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries	(45)	28	(46)	36
Shadow View Land And Farming, LLC [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries	(22)	(20)	(43)	(34)
Sutton Hill Properties LLC [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries	$ (118)	$ (45)	$ (177)	$ (55)