Non-controlling Interests (Components Of Non-controlling Interests) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Noncontrolling Interest [Line Items]
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries	$ 57	$ 423
Australian Country Cinemas, Pty Ltd [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries	82	26
Shadow View Land And Farming, LLC [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries	(2)	(3)
Sutton Hill Properties, LLC [Member]
Noncontrolling Interest [Line Items]
Net income (loss) attributable to non-controlling interests in consolidated subsidiaries	$ (23)	$ 400