Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2012

Stockholders' Equity [Abstract]

Fair value of stock option granted

	Three Months Ended
	March 31, 2012			April 2, 2011
Weighted average risk free rate of return (a)		0.62	%		1.66	%
Dividend yield		—			—
Expected volatility of the market price of the Company’s common stock		56.0	%		57.7	%
Expected option life (years)		4.1			4.1

(a) based on the quoted yield for U.S. five-year treasury bonds as of the date of grant.

Stock-based compensation expense

A summary of stock-based compensation expense is as follows:

	Three Months Ended
	March 31, 2012		April 2, 2011
Stock-based compensation expense before income taxes:
Stock options	$	2,028	$	3,821
Restricted stock grants		3,395		7,526
Total		5,423		11,347
Income tax benefit:
Stock options		682		1,366
Restricted stock grants		453		2,263
Total		1,135		3,629
Stock-based compensation expense after income taxes:
Stock options		1,346		2,455
Restricted stock grants		2,942		5,263
Total	$	4,288	$	7,718

Stock option award activity under the Company's stock incentive plans

A summary of stock option award activity under the Company’s stock incentive plans as of and for the Three Months Ended March 31, 2012 is presented below:

	Options			Weighted Average Exercise Price
Outstanding as of December 31, 2011		1,886,925		$	38.35
Granted		295,449			56.53
Exercised		(479,112	)		27.39
Forfeited / Expired		(21,335	)		49.63
Outstanding as of March 31, 2012		1,681,927		$	44.52
Options Exercisable as of March 31, 2012		1,009,827		$	38.82

Unvested restricted share/unit awards under the Company's stock incentive plans excluding Performance Awards

A summary of the activity for unvested restricted share/unit awards under the Company’s stock incentive plans (excluding Performance Awards, defined below) as of and for the Three Months Ended March 31, 2012 is presented below:

	Restricted shares/units			Weighted Average Grant Date Fair Value
Unvested as of December 31, 2011		859,766		$	39.77
Granted		176,847			56.58
Vested		(258,101	)		29.58
Forfeited		(17,614	)		46.80
Unvested as of March 31, 2012		760,898		$	46.96

Calculation of simulated TSR's under the Monte Carlo model for the Remaining Measurement Period

The calculation of simulated TSR’s under the Monte Carlo model for the Remaining Measurement Period for Performance Awards granted on March 6, 2012 and on March 1, 2011 included the following assumptions:

	March 6, 2012	March 1, 2011
Weighted average risk free rate of return	0.38%	1.07%
Dividend yield	—	—
Expected volatility - Company (a)	38.26%	61.50%
Expected volatility - Peer Companies	28.3% - 74.8%	38.2% - 113.4%
Remaining measurement period (years)	2.82	2.83

(a) Expected volatility—Company for Performance Awards granted on March 6, 2012 and on March 1, 2011 is based on a Remaining Measurement Period of 2.82 years and 2.83 years, respectively.

Performance share activity

Performance Award activity for the Three Months Ended March 31, 2012 was as follows:

	Performance Shares			Weighted Average Grant Date Fair Value
Unvested as of December 31, 2011		154,500		$	49.65
Granted		55,557			56.54
Vested		—			—
Forfeited		(1,450	)		55.57
Unvested as of March 31, 2012		208,607		$	51.44