Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2013

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

Summary of Company's 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, 2013 (in thousands, except per share amounts):

			Stock Options Outstanding				Restricted Stock Units Outstanding
	Shares Available for Grant		Number of Shares		Weighted Average Exercise Price		Number of Units		Weighted Average Grant Date Fair Value
Balance at December 31, 2012	10,155		8,900		$	6.83	3,938		$	6.44
Authorized	—		—		—		—		—
Granted	(3,757	)	1,505		5.97		1,501		6.02
Options exercised	—		(888	)	4.14		—		—
Shares released	—		—		—		(1,888	)	6.29
Forfeited or canceled	2,354		(1,632	)	7.06		(533	)	6.38
Balance at December 31, 2013	8,752		7,885		$	6.92	3,018		$	6.34

Summary of Stock Options Outstanding

The following table summarizes information about stock options outstanding as of December 31, 2013 (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	7,631	$	6.95	3.2	$	7,594
Exercisable	5,556	7.24		2.2	4,638

Summary of Restricted Stock Units Outstanding

The following table summarizes information about restricted stock units outstanding as of December 31, 2013 (in thousands, except term):

	Number of Shares Underlying Restricted Stock Units	Weighted Average Remaining Vesting Period (Years)	Aggregate Fair Value
Vested and expected to vest	2,782	0.8	$	20,534