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) (Fair Value, Measurements, Recurring, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in RealD $ 13,707 $ 9,709
Current Liabilities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swap liabilities (5,503) (9,979)
Long-Term Liabilities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swap liabilities (8,689) (6,597)
Fair Value, Inputs, Level 1
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investment in RealD 13,707 9,709
Fair Value, Inputs, Level 3 | Current Liabilities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swap liabilities (5,503) (9,979)
Fair Value, Inputs, Level 3 | Long-Term Liabilities
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Interest rate swap liabilities $ (8,689) $ (6,597)