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Impact of COVID-19 Pandemic And Liquidity (Narrative) (Details) $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
May 07, 2021 USD ($) | May 07, 2021 NZD ($) | Mar. 26, 2021 USD ($) | Mar. 06, 2020 USD ($) | Mar. 31, 2021 USD ($) item country | Mar. 31, 2021 NZD ($) item | Mar. 31, 2020 USD ($) | Dec. 31, 2020 USD ($)
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Impairment of property |  |  |  |  | $ 0 |  |  |  | $ 217,000 |
Working capital |  |  |  |  | $ (13,000,000.0) |  |  |  | (64,100,000) |
Number of cinemas closed | item |  |  |  |  | 6 |  | 6 |  |  |
Number of cinemas opened | item |  |  |  |  | 56 |  | 56 |  |  |
Number of cinemas | item |  |  |  |  | 61 |  |  |  |  |
Contractual Facility |  |  |  |  | $ 248,072,000 |  |  |  | 300,449,000 |
Number of countries in which entity operates | country |  |  |  |  | 3 |  |  |  |  |
Number of business plans | item |  |  |  |  | 2 |  |  |  |  |
Proceeds from sale of assets |  |  |  |  | $ 65,569,000 |  |  |  |  |
Repayment of long-term borrowings |  |  |  |  | $ 42,552,000 |  |  | $ 22,733,000 |  |
Shadow View Land And Farming, LLC [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Ownership percentage by noncontrolling interest |  |  |  |  | 50.00% |  |  |  |  |
Bank Of America Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual Facility |  |  |  | $ 55,000,000.0 | $ 55,000,000 |  |  |  | 55,000,000 |
44 Union Square [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Repayment of notes payable |  |  | $ 40,600,000 |  |  |  |  |  |  |
Secured debt |  |  |  |  | 0 |  |  |  |  |
Westpac Bank Corporate Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual Facility |  |  |  |  | $ 22,365,000 | [1] | $ 32.0 |  | $ 23,021,000 | [2]
United States [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Number of cinemas closed | item |  |  |  |  | 4 |  | 4 |  |  |
Number of cinemas opened | item |  |  |  |  | 19 |  | 19 |  |  |
Number of cinemas | item |  |  |  |  | 24 |  |  |  |  |
Manukau, New Zealand And Coachella, California [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from sale of assets |  |  |  |  | $ 60,000,000.0 |  |  |  |  |
Subsequent Event [Member] | 44 Union Square [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Contractual Facility | $ 43,000,000.0 |  |  |  |  |  |  |  |  |
Subsequent Event [Member] | Westpac Bank Corporate Credit Facility [Member] |  |  |  |  |  |  |  |  |  |
Impact Of Covid [Line Items] |  |  |  |  |  |  |  |  |  |
Repayment of long-term borrowings | $ 11,200,000 | $ 16.0 |  |  |  |  |  |  |  |
[1] | The contractual facilities and outstanding balances of the foreign currency denominated borrowings were translated into U.S. dollars based on the applicable exchange rates as of March 31, 2021.
[2] | The contractual facilities and outstanding balances of the foreign currency denominated borrowings were translated into U.S. dollars based on the applicable exchange rates as of December 31, 2020.

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