Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities - current	$ (5,389)	[1]
Interest rate swap liabilities - long term	(4,861)	[2]
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities - current	(5,389)		(5,503)
Interest rate swap liabilities - long term	(4,861)		(8,689)
Investment in RealD	8,559		13,707
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in RealD	8,559		13,707
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap liabilities - current	(5,389)		(5,503)
Interest rate swap liabilities - long term	$ (4,861)		$ (8,689)

[1] Included in accounts payable and accrued expenses on the condensed consolidated balance sheet as of September 30, 2013.

[2] Included in other long-term liabilities on the condensed consolidated balance sheet as of September 30, 2013.