Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Benefit Plans [Abstract]

Summary of Stock option and restricted stock unit activity

The following table summarizes the Company’s stock option and restricted stock unit activity during the year ended December 31, 2011 (in thousands, except per share amounts):

				Stock Options					Restricted Stock Units
	Shares Available for Grant			Number of Shares			Weighted Average Exercise Price		Number of Units			Weighted Average Grant Date Fair Value
Balance at December 31, 2010		10,449			11,020		$	6.90		4,507		$	6.49
Granted		(4,091	)		1,038		$	8.70		2,036		$	8.69
Options exercised		—			(1,794	)	$	6.17		—
Shares released		—			—					(1,663	)	$	6.90
Forfeited or cancelled		1,477			(961	)	$	8.14		(1,167	)	$	6.48
Balance at December 31, 2011		7,835			9,303		$	7.12		3,713		$	7.52

Summary of stock options and restricted stock units , Vested and expected to vest , Exercisable

The following table summarizes information about stock options outstanding as of December 31, 2011 (in thousands, except per share amounts and term):

	Number of Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (Years)		Aggregate Intrinsic Value
Vested and expected to vest		9,194	$	7.11		3.5	$	3,108
Exercisable		7,034	$	7.25		2.8	$	1,999

The following table summarizes information about restricted stock units outstanding as of December 31, 2011 (in thousands, except per share amounts and term):

	Number of Shares Underlying Restricted Stock Units		Weighted Average Remaining Vesting Period (Years)		Aggregate Fair Value
Vested and expected to vest		3,488		1.2	$	17,584