Annual report pursuant to Section 13 and 15(d)

Other Investments - Additional Information (Detail)

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