Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 03, 2016	Apr. 05, 2015	Dec. 31, 2015
Income Taxes [Line Items]
Effective tax rate	12.60%	22.70%
U.S. statutory federal tax rate	35.00%
Other discrete tax benefits	$ 0.4
Discrete tax benefit related to decrease in uncertain tax positions	2.5	$ (1.2)
Gains on non-taxable foreign exchange	1.2
Marketable securities	0.9
Discrete tax benefit related to disqualifying dispositions of incentive stock options and employee stock purchase plan shares		0.5
Uncertain tax positions	35.2		$ 33.7
Net Increase in uncertain tax positions	1.5
Decrease in unrecognized tax benefits	(9.1)
Accrued interest and penalties	0.8		$ 0.5
Interest and penalties related to income tax	0.3
Tax savings due to the tax holiday	$ 2.6	$ 1.1
Tax savings due to the tax holiday, per share	$ 0.01
Tax holiday expiration date	December 31, 2020