Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 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:

	June 30, 2013
Shares available for grant	2,331,500
Shares of common stock reserved for issuance	3,910,876

Schedule of Options Outstanding and Exercisable

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

	June 30, 2013
	Options Outstanding		Options Exercisable
Number	767,869		199,785
Weighted average exercise price	$	39.38	$	28.71
Aggregate intrinsic value	$ 25.8 million		$ 8.9 million
Weighted average remaining contractual term	5.0 years		3.9 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:

	June 30, 2013
	RSUs Nonvested		RSUs Expected to Vest
Number	811,509		718,887
Weighted average grant date per share fair value	$	43.13	$	42.67
Aggregate intrinsic value	$ 59.3 million		$ 52.5 million
Weighted average remaining term to vest	1.4 years		1.4 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				Twenty-Six Weeks Ended
	June 30, 2013		July 1, 2012		June 30, 2013		July 1, 2012
Cost of sales	$	616	$	365	$	1,211	$	864
Research and development	545		443		1,076		957
Selling, general and administrative	3,187		2,255		6,425		4,855
Total stock-based compensation	$	4,348	$	3,063	$	8,712	$	6,676