Income Taxes - U.S. and Foreign Components of Income before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Dec. 25, 2015
Income Tax Disclosure [Abstract]
U.S. operations	$ 8,869	$ (17,459)	$ (10,910)
Foreign operations	78,073	36,406	14,517
Income before provision for income taxes	$ 86,942	$ 18,947	$ 3,607