Stock-Based Compensation Expense - Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 3,956,000	$ 2,781,000	$ 7,960,000	$ 6,079,000
Tax benefit from compensation expense	1,266,000	911,000	2,572,000	2,004,000
Compensation recognized period costs capitalized amount	0		0		0
Product cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	268,000	177,000	553,000	404,000
Service cost of revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	44,000	47,000	107,000	110,000
Research, development, and engineering
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	988,000	650,000	2,044,000	1,463,000
Selling, general, and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,656,000	$ 1,907,000	$ 5,256,000	$ 4,102,000