Annual report pursuant to Section 13 and 15(d)

Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

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Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate swap liabilities - current [1]   $ (373)    
Other Investments $ 98,317 94,973    
Other Affiliates        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other Investments $ 98,317 94,973 $ 77,658 $ 59,657
Other Affiliates | RealD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other Investments   12,900 [2] $ 14,429 $ 10,443
Level 1 | Other Affiliates | RealD        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other Investments [2]   12,900    
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate swap liabilities - current [1]   $ (373)    
[1] The Company was previously party to an interest rate swap agreement. That agreement expired in April 2016.
[2] The Company's investment in RealD was sold in March of 2016. See discussion at Note 6.