Summary Financial Information for National Cinemedia (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 25, 2014 NCM	Sep. 26, 2013 NCM	Sep. 25, 2014 NCM	Sep. 26, 2013 NCM
Schedule of Equity Method Investments [Line Items]
Gross revenues					$ 100,738	$ 135,022	$ 270,911	$ 340,051
Operating income	82,284	135,192	267,005	334,838	42,858	67,309	97,756	146,872
Net earnings	$ 38,532	$ 80,745	$ 146,362	$ 134,644	$ 26,909	$ 51,794	$ 50,612	$ 98,572