Quarterly report pursuant to Section 13 or 15(d)

Summary of Activity for Each of Company's Other Investments (Detail)

v3.8.0.1
Summary of Activity for Each of Company's Other Investments (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance $ 120,045  
Cash distributions received [1] (12,323) $ (12,049)
Equity in income 8,636 10,060
Equity in other comprehensive income 136 $ 198
Investments, ending balance 118,789  
Other Affiliates    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 120,045  
Cash contributions made 404  
Cash distributions received (5,201)  
Equity in income 4,621  
Equity in other comprehensive income 136  
Other (1,216)  
Investments, ending balance 118,789  
Other Affiliates | Digital Cinema Implementation Partners    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 106,215  
Cash contributions made 326  
Cash distributions received (5,201)  
Equity in income 4,142  
Equity in other comprehensive income 136  
Other 0  
Investments, ending balance 105,618  
Other Affiliates | AC JV, LLC    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 5,916  
Cash contributions made 0  
Cash distributions received 0  
Equity in income 253  
Equity in other comprehensive income 0  
Other 0  
Investments, ending balance 6,169  
Other Affiliates | Digital Cinema Distribution Coalition    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 3,598  
Cash contributions made 0  
Cash distributions received 0  
Equity in income 226  
Equity in other comprehensive income 0  
Other (1,168)  
Investments, ending balance 2,656  
Other Affiliates | Other Investments    
Schedule Of Equity Method Investments [Line Items]    
Investments, beginning balance 4,316  
Cash contributions made 78  
Cash distributions received 0  
Equity in income 0  
Equity in other comprehensive income 0  
Other (48)  
Investments, ending balance $ 4,346  
[1] Includes cash distributions received from equity investees that were recorded as a reduction of the respective investment balances (see Notes 7 and 8). These distributions are reported entirely within the U.S. operating segment.