Summary Financial Information for National Cinemedia (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 27, 2014 NCM	Mar. 28, 2013 NCM
Schedule of Equity Method Investments [Line Items]
Gross revenues			$ 70,215	$ 82,219
Operating income	67,855	65,629	12,767	21,635
Net earnings (loss)	$ 35,696	$ 33,062	$ (2,764)	$ 5,625