Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Provision for estimated expenses	$ 2,307	$ 4,269
Depreciation	1,005	2,230
Operating loss carryforwards	17,424	24,560
Salaries and wages	1,579	2,832
Share-based compensation	8,016	13,374
Foreign tax credit carryforwards	8,964	4,075
Other	8,991	12,154
Other comprehensive income	4,797	18,001
Less: valuation allowance	(22,760)	(18,270)
Total deferred tax assets	30,323	63,225
Other	(1,025)	(1,209)
Amortization	(166,257)	(229,559)
Total deferred tax liabilities	(167,282)	(230,768)
Net deferred tax liabilities	$ (136,959)	$ (167,543)