Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

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

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

RSU activity for the three months ended March 31, 2012, is as follows:

	Number of		Weighted Average Grant-Date
(in thousands, except weighted average fair value prices)	Shares		Fair Value
Unvested RSUs outstanding at December 31, 2011	1,193		$	17.74
RSUs granted	641		$	16.35
RSUs vested	(265	)	$	18.13
RSUs forfeited	(11	)	$	17.71
Unvested RSUs outstanding at March 31, 2012	1,558		$	17.10

Schedule of Other Share-based Compensation, Activity [Table Text Block]

PBRSU activity for the three months ended March 31, 2012, is as follows:

	Number of		Weighted Average Grant-Date
(in thousands, except weighted average fair value prices)	Shares		Fair Value
Unvested PBRSUs outstanding at December 31, 2011	988		$	17.71
PBRSUs granted	345		$	16.05
PBRSUs vested	(103	)	$	17.76
PBRSUs forfeited	(16	)	$	18.44
Unvested PBRSUs outstanding at March 31, 2012	1,214		$	17.23

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

.  The fair values of these stock options were estimated using the Black-Scholes valuation model with the following weighted-average assumptions:

	For the Three Months Ended
	March 31,
	2012		2011
Expected dividend yield	—	%	—	%
Risk-free interest rate (1)	1.00	%	2.01	%
Expected volatility (2)	42.81	%	32.02	%
Expected life (3)	5.5		5.5

(1) The risk-free interest rate for the periods within the contractual term of the options is based on the U.S. Treasury yield curve in effect at the time of the grant.

(2) The expected volatility is a measure of the amount by which a stock price has fluctuated or is expected to fluctuate based primarily on our and our peers' historical data.

(3) The expected life is the period of time, on average, that participants are expected to hold their options before exercise based primarily on our historical data

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Option activity for the three months ended March 31, 2012 is as follows:

(in thousands, except weighted average price)	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term	Aggregate Intrinsic Value
Options outstanding at December 31, 2011	4,601		$	20.78
Options granted	581		$	16.00
Options exercised	(14	)	$	13.54
Options canceled	(524	)	$	19.99
Options outstanding at March 31, 2012	4,644		$	20.08	5.7	$	1,652
Options vested and expected to vest at March 31, 2012	4,575		$	20.13	5.6	$	1,616
Options exercisable at March 31, 2012	2,747		$	22.08	3.4	$	755

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

The following table sets forth the stock-based compensation expense recognized for the three months ended March 31, 2012 and 2011.

	For the Three Months Ended
	March 31,
(in thousands)	2012		2011
RSUs	$	2,213	$	1,742
PBRSUs	1,360		585
Stock options	781		707
Employee stock purchase plan	—		76
	$	4,354	$	3,110