Non-controlling Interests (Components Of Non-controlling Interests) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	$ 4,195	$ 4,418
Australian Country Cinemas, Pty Ltd [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	228	264
Shadow View Land And Farming, LLC [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	1,885	1,980
Sutton Hill Properties, LLC [Member]
Noncontrolling Interest [Line Items]
Non-controlling interests in consolidated subsidiaries	$ 2,082	$ 2,174