Investment in Digital Cinema Implementation Partners - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013 RenewalOptions ProjectionSystem	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Voting interest in Digital Cinema Implementation Partners	33.00%
Economic interest in Digital Cinema Implementation Partners	24.30%
Equity in income	$ 2,421,000	$ 1,790,000
Digital projection systems leased under operating lease, initial term	12 years
Number of equipments being leased under master equipment lease agreement	3,515
Equipment lease expense	1,966,000	1,929,000
Number of one-year fair value renewal options	10
Minimum annual rent per digital projection system	1,000
Minimum annual rent per digital projection system through the end of the lease term	3,000
Digital Cinema Implementation Partners LLC
Schedule of Equity Method Investments [Line Items]
Equity in income	$ 1,552,000	$ 1,099,000