Stock-Based and Other Incentive Compensation (Tables)

12 Months Ended

Dec. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock options outstanding under equity-based compensation plans

Stock Options

A summary of the changes in stock options outstanding under our equity-based compensation plans during 2013 is presented below:

	Number of Options		Weighted Average Remaining Contract Term (Years)	Weighted Average Exercise Price		Aggregate Intrinsic Value
Options outstanding as of December 31, 2012	3,461		7.8	$	9.34	$	0.7
Granted	235			$	17.73	—
Exercised	(113	)		$	9.87	$	0.6
Cancelled	(952	)		$	8.25	—
Options outstanding as of December 31, 2013	2,631		4.2	$	10.46	$	17.8
Options exercisable as of December 31, 2013	1,261		3.4	$	10.31	$	9.0
Options expected to vest after December 31, 2013	1,371		5.0	$	10.60	$	8.8

Schedule of valuation assumptions

The fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model. The weighted-average assumptions used in the model are outlined in the following table:

	2013		2012		2011
Assumptions:
Expected volatility	60	%	56	%	52	%
Risk-free interest rate	2.2	%	1.3	%	1.9	%
Dividend yield	—		—		—
Expected life (in years)	6		6		6

RSUs outstanding under equity-based compensation plans

Restricted Stock Units

A summary of the changes in RSUs outstanding under our equity-based compensation plans during 2013 is presented below:

	Number of Restricted Stock Units		Weighted Average Grant Date Fair Value
Unvested RSUs as of December 31, 2012	4,815		$	10.53
Granted	2,723		$	12.49
Vested	(1,115	)	$	12.61
Cancelled	(1,211	)	$	9.13
Unvested RSUs as of December 31, 2013	5,212		$	11.93