Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2012

Summary of the status of the company's stock option plan

A summary of the Company's stock option activity for the three months ended March 31, 2012 is as follows (share numbers and aggregate intrinsic values in thousands):

	Number of Options Outstanding			Weighted Average Exercise Price		Weighted Average Contractual Term (Years)		Aggregate Intrinsic Value
Balances, December 31, 2011		2,768		$	15.71
Granted		43			27.00
Exercised		(190	)		17.63
Forfeited, cancelled or expired		(23	)		20.38
Balances, March 31, 2012		2,598		$	15.71		6.1	$	43,498
Options vested and expected to vest at March 31, 2012		2,500		$	15.41		6.0	$	42,310
Options vested at March 31, 2012		2,093		$	13.28		5.5	$	38,053

Assumption used to value options granted during the period

The assumptions used to value options granted during the three months ended March 31, 2012 and 2011 were as follows:

	Three Months Ended March 31,
	2012			2011
Dividend yield		-			-
Annual risk free rate of return		0.9	%		2.1	%
Expected volatility		58.7	%		48.1	%
Expected term (years)		4.3			4.5

Summary of company restricted stock unit activity

A summary of the Company's restricted stock unit activity for the three months ended March 31, 2012, is as follows (share numbers in thousands):

	Number of Units Outstanding			Weighted Average Grant Date Fair Value
Awarded and unvested, December 31, 2011		1,969		$	31.33
Granted		1,395			27.60
Vested		(609	)		21.13
Forfeited		(72	)		34.80
Awarded and unvested, March 31, 2012		2,683		$	31.61
Restricted stock units expected to vest, March 31, 2012		2,211