Summary Financial Information for National CineMedia (Detail) - NCM - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 30, 2016	Oct. 01, 2015	Jun. 30, 2016	Oct. 01, 2015
Schedule of Equity Method Investments [Line Items]
Gross revenues	$ 115,383	$ 111,662	$ 191,625	$ 310,061
Operating income	46,679	47,685	52,430	78,961
Net earnings (loss)	$ 33,220	$ 34,844	$ 25,710	$ 38,519