Stock-Based Compensation (Tables)

3 Months Ended

Apr. 03, 2016

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:

	April 3, 2016
Shares available for grant	1,635,526
Shares of common stock reserved for issuance pursuant to outstanding exercisable securities	3,109,300

Schedule of Options Outstanding and Exercisable

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

	April 3, 2016
	Options Outstanding			Options Exercisable
Number	898,248			308,697
Weighted average exercise price	$	72.15		$	57.97
Aggregate intrinsic value	$	16.2	million	$	9.9	million
Weighted average remaining contractual term	5.0 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:

	April 3, 2016
	RSUs Unvested			RSUs Expected to Vest
Number	575,526			503,550
Weighted average grant date per share fair value	$	78.99		$	78.89
Aggregate intrinsic value	$	51.9	million	$	45.4	million
Weighted average remaining term to vest	1.7 years			1.6 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
	April 3, 2016		March 29, 2015
Cost of sales	$	887	$	792
Research and development	779		630
Selling, general and administrative	4,173		4,527
Total stock-based compensation	$	5,839	$	5,949