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v3.21.2

Borrowings (Cinema 1, 2, 3 Term Loan) (Narrative) (Details) $ in Thousands |  |  | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Mar. 13, 2020 USD ($) | Mar. 12, 2020 USD ($) | Sep. 30, 2021 USD ($) item | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |
Contractual facility |  |  | $ 269,953 | $ 300,449
Sutton Hill Properties, LLC [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Ownership percentage by parent |  |  | 75.00% |
US Cinema 1, 2, 3 Term Loan [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Contractual facility | $ 25,000 | $ 20,000 | $ 24,189 | $ 24,625
Interest rate | 4.25% |  |  |
Number of extension options | item |  |  | 2 |
Extension period |  |  | 6 months |
Maturity date | Apr. 01, 2022 |  | Apr. 01, 2022 | Apr. 01, 2022

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