Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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:

	December 31, 2012
Shares available for grant	2,070,954
Shares of common stock reserved for issuance	3,812,222

Schedule of Options Outstanding and Exercisable

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

	December 31, 2012
	Options Outstanding		Options Exercisable
Number	869,779		267,464
Weighted average exercise price	$	35.81	$	25.28
Aggregate intrinsic value	$ 17.1 million		$ 8.1 million
Weighted average remaining contractual term	5.0 years		3.3 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:

	December 31, 2012
	RSUs Nonvested		RSUs Expected to Vest
Number	871,491		746,958
Weighted average grant date per share fair value	$	41.67	$	41.22
Aggregate intrinsic value	$ 48.3 million		$ 41.4 million
Weighted average remaining term to vest	1.8 years		1.8 years

Schedule of Stock Option Activity

Activity under these plans was as follows (share amounts in thousands):

	Year Ended December 31, 2012
	Shares Subject to Options		Weighted Average Exercise Price
Balance, beginning of period	924		$	28.13
Granted	229		53.64
Forfeited	(47	)	27.86
Expired	(3	)	27.62
Exercised	(233	)	24.57
Balance, end of period	870		35.81

Schedule of Restricted Stock Unit Activity

	Year Ended December 31, 2012
	Restricted Stock Units		Weighted Average Grant Date Per Share Fair Value
Balance, beginning of period	858		$	31.00
Granted	384		53.28
Forfeited	(53	)	30.89
Vested	(318	)	28.69
Balance, end of period	871		41.67

Stock-Based Compensation Disclosures

Certain information regarding our stock-based compensation was as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Weighted average grant-date fair value of stock options granted	$	12,279	$	11,703	$	6,516
Weighted average grant-date fair value of restricted stock units	20,461		15,499		7,830
Total intrinsic value of stock options exercised	6,293		10,550		554
Fair value of restricted stock units vested	9,113		8,120		7,587
Cash received from stock options exercised and shares purchased under all stock-based arrangements	13,131		24,382		7,983
Tax benefit realized for stock options	3,137		2,918		12,084

Schedule of Stock-Based Compensation Expense

Our stock-based compensation expense was included in our Consolidated Statements of Operations as follows (in thousands):

	Year Ended December 31,
	2012		2011		2010
Cost of sales	$	1,858	$	1,511	$	1,211
Research and development	1,903		1,873		1,538
Selling, general and administrative	10,393		7,727		7,733
Total stock-based compensation	$	14,154	$	11,111	$	10,482

Schedule of Stock-Based Compensation Valuation Assumptions

The following weighted average assumptions were used in determining fair value pursuant to the Black-Scholes option pricing model:

	Year Ended December 31,
	2012		2011		2010
Risk-free interest rate	0.13% - 0.81%		0.06% - 2.02%		0.14% - 2.27%
Dividend yield	0.00% - 0.72%		—	%	—	%
Expected term:
Option plans	5.3 - 5.5 years		5.5 - 5.7 years		5.6 - 5.9 years
Employee share purchase plan	6 months		6 months		6 months
Volatility	36% - 55%		36% - 55%		31% - 51%
Discount for post vesting restrictions	—	%	—	%	—	%