Impairment of Property and Equipment - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2013 Theatre	Dec. 31, 2012 Theatre	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Impairment charges	$ 2,974	$ 882	$ 1,930	$ 3,726	$ 4,227	$ 3,123
Estimated aggregate fair value of long-lived assets impaired				4,823	5,932
Number of operating theatres where competition entered the market				1
Impairment charges on theatres using valuation inputs				2,758	2,376	2,086
Impairment charges on theatres impaired on prior years using valuation inputs				361	191	703
Impairment charges on previously impaired theatres using valuation inputs				$ 750	$ 1,782	$ 700
Number of theatres					2
Minimum [Member]
Property, Plant and Equipment [Line Items]
Projects future attendance fluctuations, percent				(10.00%)
Risk-adjusted of return, discount rate				10.00%
Maximum [Member]
Property, Plant and Equipment [Line Items]
Projects future attendance fluctuations, percent				10.00%
Risk-adjusted of return, discount rate				15.00%