Computations of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Earnings Per Share Disclosure [Line Items]
Net income attributable to Cinemark Holdings, Inc.	$ 32,594		$ 42,104
Earnings allocated to participating share-based awards	(318)	[1]	(441)	[1]
Net income attributable to common stockholders	$ 32,276		$ 41,663
Basic weighted average common stock outstanding	113,447		112,825
Common equivalent shares for stock options	15		40
Common equivalent shares for restricted stock units	517		503
Diluted	113,979		113,368
Basic earnings per share attributable to common stockholders	$ 0.28		$ 0.37
Diluted earnings per share attributable to common stockholders	$ 0.28		$ 0.37

[1] For the three months ended March 31, 2013 and 2012, a weighted average of approximately 1,128 and 1,200 shares of unvested restricted stock, respectively, were considered participating securities.