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Non-controlling Interests (Components Of Income Attributable To Non-controlling Interest) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Noncontrolling Interest [Line Items] |  |
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries | $ 3,103 | $ (80)
Australian Country Cinemas, Pty Ltd [Member] |  |
Noncontrolling Interest [Line Items] |  |
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries | 59 | (1)
Shadow View Land And Farming, LLC [Member] |  |
Noncontrolling Interest [Line Items] |  |
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries | 3,152 | (21)
Sutton Hill Properties, LLC [Member] |  |
Noncontrolling Interest [Line Items] |  |
Net income (loss) attributable to noncontrolling interests in consolidated subsidiaries | $ (108) | $ (58)

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