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Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) a segment | Dec. 31, 2021 AUD ($) segment | Dec. 31, 2021 NZD ($) segment | Dec. 31, 2020 USD ($) | Dec. 31, 2020 AUD ($) | Dec. 31, 2020 NZD ($) | Dec. 31, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Cash position | $ 88,571,000 |  |  | $ 26,834,000 |  |  | $ 12,142,000
Restricted cash, Current | $ 5,320,000 |  |  | 8,000 |  |  | 7,000
Number of operating segments | segment | 2 | 2 | 2 |  |  |  |
Impairment of long-lived assets | $ 0 |  |  | 217,000 |  |  | 0
Goodwill impairment | 0 |  |  | 0 |  |  | 0
Advertising expense | 700,000 |  |  | 700,000 |  |  | 1,800,000
Gains/(losses) on the settlement of litigation | 800,000 |  |  | 3,000 |  |  | $ (67,000)
Unfavorable [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Derivative position | 181,000 |  |  | 430,000 |  |  |
Favorable [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Derivative position | $ 208,000 |  |  |  |  |  |
Non Income Producing Properties [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Impairment of long-lived assets |  |  |  | 217,000 |  |  |
Mt. Gravatt [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage | 33.30% |  |  |  |  |  |
Rialto Cinemas [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage | 50.00% |  |  |  |  |  |
Australia [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Subsidies received | $ 2,600,000 | $ 3.5 |  | 9,500,000 | $ 12.3 |  |
New Zealand [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Subsidies received | $ 366,000 |  | $ 518 | $ 1,400,000 |  | $ 1,900 |
Australian Country Cinemas, Pty Ltd [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage by parent | 75.00% |  |  |  |  |  |
Sutton Hill Properties, LLC [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage by parent | 75.00% |  |  |  |  |  |
Shadow View Land And Farming, LLC [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage by parent | 50.00% |  |  |  |  |  |
Area of property | a | 202 |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage | 20.00% |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Ownership percentage | 50.00% |  |  |  |  |  |

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