Stock-Based Compensation (Tables)

3 Months Ended

Mar. 29, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Information Related to Stock-Based Compensation Plans

The following table sets forth certain information regarding the 1995 Plan:

	March 29, 2015
Shares available for grant	1,909,185
Shares of common stock reserved for issuance pursuant to outstanding exercisable securities	3,236,286

Schedule of Options Outstanding and Exercisable

The following table sets forth certain information regarding all options outstanding and exercisable:

	March 29, 2015
	Options Outstanding		Options Exercisable
Number	779,158		299,095
Weighted average exercise price	$	62.38	$	45.79
Aggregate intrinsic value	$ 13.4 million		$ 9.4 million
Weighted average remaining contractual term	4.7 years		3.5 years

Schedule of Restricted Stock Units Nonvested and Expected to Vest

The following table sets forth certain information regarding all RSUs nonvested and expected to vest:

	March 29, 2015
	RSUs Nonvested		RSUs Expected to Vest
Number	547,945		488,536
Weighted average grant date per share fair value	$	70.86	$	70.25
Aggregate intrinsic value	$ 41.3 million		$ 36.9 million
Weighted average remaining term to vest	1.3 years		1.3 years

Schedule of Stock-Based Compensation Expense

Our stock-based compensation expense was included in our consolidated statements of operations as follows (in thousands):

	Thirteen Weeks Ended
	March 29, 2015		March 30, 2014
Cost of sales	$	792	$	726
Research and development	630		617
Selling, general and administrative	4,527		3,796
Total stock-based compensation	$	5,949	$	5,139