Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Stock-Based Compensation

Stock-based compensation expense

	Three Months Ended March 31,
	2012		2011
Stock options	$	1.7	$	1.6
Restricted stock	0.2		0.2
Total stock-based compensation, pre-tax	1.9		1.8
Tax benefit	0.3		0.3
Total stock-based compensation, net of tax	$	1.6	$	1.5

Assumptions regarding volatility, expected life, dividend yield and risk free interest

	2012	2011
Risk-free interest rates	1.24% -1.78%	2.56% -3.12%
Expected life	6.5 years	6.5 years
Volatility	55.9%	57.2%
Expected dividend yield	0.0%	0.0%

Schedule of stock option activity

	Shares Subject to Options		Weighted Average Option Price		Weighted Average Remaining Contractual Term (Yrs)	Aggregate Intrinsic Value (in millions) (b)
Outstanding at December 31, 2011	5,096,253		$	10.64
Granted	113,500		14.21
Exercised	(220,991	)	8.20			$	1.7
Forfeited	(99,865	)	13.81
Outstanding at March 31, 2012	4,888,897		$	10.77	6.4	$	22.7
Exercisable at March 31, 2012	2,615,065		$	8.90	5.0	$	16.8
Exercisable and expected to vest at March 31, 2012 (a)	4,759,289		$	10.71	6.3	$	22.4

(a)In addition to the options that are exercisable at March 31, 2012, the Company expects a portion of the unvested options to become exercisable in the future. Options expected to vest in the future are determined by applying an estimated forfeiture rate to the options that are unvested as of March 31, 2012.

(b)The aggregate intrinsic value is based on the positive difference between the fair value of the Company’s common stock price of $15.31 on March 31, 2012, or the date of exercises, as appropriate, and the exercise price of the underlying stock options.

Schedule of restricted stock activity

	Shares Subject to Restriction		Weighted Average Grant Date Fair Value
Outstanding at December 31, 2011	236,232		$	17.76
Vested	(24,210	)	10.01
Outstanding at March 31, 2012	212,022		$	18.64