Non-controlling Interests (Components Of Non-controlling Interests) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	$ 4,331	$ 4,418
Australian Country Cinemas, Pty Ltd [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	138	264
Sutton Hill Properties, LLC [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	2,066	2,174
Shadow View Land And Farming, LLC [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	$ 2,127	$ 1,980