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Investment in National CineMedia LLC - Additional Information (Detail) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jul. 05, 2018 USD ($) $ / shares shares | Dec. 31, 2019 USD ($) $ / shares shares | Mar. 31, 2019 USD ($) shares | Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jul. 04, 2018 | Dec. 31, 2016 USD ($)
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Number of additional common units of NCM received under common unit adjustment agreement | shares |  |  | 219,056 |  |  |  |  |
Value of common units received from NCM |  |  | $ 1,552 | $ 1,552 | $ 5,012 | $ 18,363 |  |
Interest in common units of NCM acquired by Company |  | 25.00% |  | 25.00% |  |  |  |
Number of common units of NCM owned by Company | shares |  | 39,737,700 |  | 39,737,700 |  |  |  |
Investment In NCM |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Common unit convertible into share of NCMI common stock, conversion ratio |  |  | 1 |  |  |  |  |
Value of common units in cash |  |  |  |  | 78,393 |  |  |
Estimated fair value of investment using NCM's stock price |  | $ 289,688 |  | $ 289,688 |  |  |  |
NCMI common stock price | $ / shares |  | $ 7.29 |  | $ 7.29 |  |  |  |
Investment in NCM |  | $ 265,792 |  | $ 265,792 | 275,592 | 200,550 |  | $ 189,995
NCM |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Remaining performance obligations |  | 174,000 |  | $ 174,000 |  |  |  |
Deferred revenue amortization year and month |  |  |  | 2041-02 |  |  |  |
Number of common units of NCM acquired by Company | shares | 10,738,740 |  |  |  |  |  |  |
Value of common units in cash | $ 78,393 |  |  |  | 78,393 |  |  |
Common unit price per share | $ / shares | $ 7.30 |  |  |  |  |  |  |
Interest in common units of NCM acquired by Company | 25.00% |  |  |  |  |  | 18.00% |
Investment in NCM |  | 265,792 |  | $ 265,792 | 275,592 |  |  |
Deferred revenue or NCM screen advertising advances extended term |  |  |  | 2041-02 |  |  |  |
NCM | Adoption of ASC Topic 606 |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Increase in screen advertising advances |  | 62,893 |  |  |  |  |  |
Screen advertising advances, tax |  | 15,346 |  |  |  |  |  |
Reduction in retained earnings |  | (47,547) |  |  |  |  |  |
Reduction in other revenues |  | (1,403) |  |  |  |  |  |
Increase in interest expense |  | 4,721 |  |  |  |  |  |
Reduction of net income |  | $ (4,630) |  |  |  |  |  |
NCM | Theatre Properties and Equipment |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |
Payment for installation of certain equipment used for digital advertising |  |  |  | $ 61 | $ 74 | $ 102 |  |

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