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v3.10.0.1

Other Investments - Additional Information (Detail) |  |  | 1 Months Ended | 12 Months Ended | 24 Months Ended
--- | --- | --- | --- | --- | ---
Apr. 30, 2018 USD ($) | Mar. 22, 2016 USD ($) $ / shares | Dec. 31, 2013 USD ($) | Mar. 31, 2011 $ / shares | Dec. 31, 2018 USD ($) RenewalOption ProjectionSystem shares | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2013 USD ($) | Dec. 31, 2011 shares
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Number of options to purchase common stock | shares |  |  |  |  |  |  |  |  | 1,222,780
Exercise price of options, per share | $ / shares |  |  |  | $ 0.00667 |  |  |  |  |
Number of shares owned in RealD | shares |  |  |  |  | 1,222,780 |  |  |  |
Proceeds from sale of marketable securities |  |  |  |  |  |  | $ 13,451,000 |  |
Other Affiliates |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Cash contributions |  |  |  |  | $ 22,076,000 | $ 3,715,000 | 1,132,000 |  |
Digital Cinema Implementation Partners |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Percentage of voting interest |  |  |  |  | 33.00% |  |  |  |
Economic interest in Digital Cinema Implementation Partners |  |  |  |  | 24.30% |  |  |  |
Number of equipment being leased under master equipment lease agreement | ProjectionSystem |  |  |  |  | 3,837 |  |  |  |
Digital Cinema Implementation Partners | Other Affiliates |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Digital projection systems leased under operating lease, initial term |  |  |  |  | 12 years |  |  |  |
Number of one-year fair value renewal options | RenewalOption |  |  |  |  | 10 |  |  |  |
Minimum annual rent per digital projection system |  |  |  |  | $ 1,000 |  |  |  |
Cash contributions |  |  |  |  | 2,076,000 | 1,112,000 | 717,000 |  |
RealD | Other Affiliates |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Purchase price per share | $ / shares |  | $ 11.00 |  |  |  |  |  |  |
Proceeds from sale of marketable securities |  | $ 13,451,000 |  |  |  |  |  |  |
Gain on investment |  |  |  |  |  |  | 3,742,000 |  |
Unrealized holding gain previously recorded in AOCI |  |  |  |  |  |  | 3,191,000 |  |
AC JV, LLC |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Cash contributions |  |  | $ 268,000 |  |  |  |  |  |
Ownership of class A units |  |  |  |  |  |  |  | 32.00% |
Promissory note term |  |  |  |  |  |  |  | 6 years |
Original principal value of promissory note with NCM |  |  |  |  |  |  |  | $ 8,333,000 |
Annual interest rate on promissory note |  |  | 5.00% |  |  |  |  | 5.00% |
Remaining outstanding balance of note payable |  |  |  |  | 1,389,000 |  |  |  |
AC JV, LLC | Film rentals and advertising |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Event fees |  |  |  |  | $ 12,481,000 | 13,950,000 | 10,871,000 |  |
Digital Cinema Distribution Coalition |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Percentage of voting interest |  |  |  |  | 14.60% |  |  |  |
Payments for content delivery services |  |  |  |  | $ 927,000 | $ 848,000 | $ 939,000 |  |
CNMK Texas Properties, LLC |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Percentage of voting interest | 50.00% |  |  |  |  |  |  |  |
Cash contributions | $ 20,000,000 |  |  |  |  |  |  |  |
CNMK Texas Properties, LLC | AWSR Investments, LLC |  |  |  |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |  |  |  |
Percentage of voting interest | 50.00% |  |  |  |  |  |  |  |
Cash contributions | $ 20,000,000 |  |  |  |  |  |  |  |

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