Summary of Changes in Company's Investment in Digital Implementation Partners (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Beginning balance	$ 23,012
Equity in income	(2,421)	(1,790)
Ending balance	24,564
Digital Cinema Implementation Partners LLC
Schedule of Equity Method Investments [Line Items]
Beginning balance	23,012
Equity in income	1,552
Ending balance	$ 24,564