Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

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 and the 1995 Supplemental Plan:

	March 31, 2013
Shares available for grant	2,056,369
Shares of common stock reserved for issuance	3,716,733

Schedule of Options Outstanding and Exercisable

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

	March 31, 2013
	Options Outstanding		Options Exercisable
Number	800,790		196,163
Weighted average exercise price	$	37.93	$	26.31
Aggregate intrinsic value	$ 21.3 million		$ 7.5 million
Weighted average remaining contractual term	5.1 years		3.6 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 31, 2013
	RSUs Nonvested		RSUs Expected to Vest
Number	859,576		748,735
Weighted average grant date per share fair value	$	42.43	$	41.97
Aggregate intrinsic value	$ 55.5 million		$ 48.3 million
Weighted average remaining term to vest	1.6 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
	March 31, 2013		April 1, 2012
Cost of sales	$	595	$	499
Research and development	531		514
Selling, general and administrative	3,238		2,600
Total stock-based compensation	$	4,364	$	3,613