STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Dec. 31, 2012

Common Stock Shares Reserved for Issuance

Of the 126,980,506 shares of common stock authorized but unissued as of December 31, 2012, the following shares were reserved for issuance:

Stock option and restricted stock unit plans	4,979,110
Consultant Incentive Plan	326,480
2002 Restricted Stock Plan	15,752
	5,321,342

Restricted Stock Units Activity for 2004 Equity Incentive Plan

The following table summarizes restricted stock units activity for the 2004 Equity Incentive Plan:

	Year Ended December 31,
	2012		2011		2010
Restricted stock units granted		635,266		500,048		596,463
Weighted average grant-date fair value of restricted stock units granted	$	31.52	$	29.28	$	21.32
Total fair value of restricted stock units granted	$	20,025	$	14,643	$	12,750
Restricted stock units becoming free of restrictions		662,909		576,522		511,196
Weighted average restriction period (in years)		3.2		3.9		3.8

Summary of Activity Related to Restricted Stock Units

A summary of activity related to restricted stock units under the 2004 Equity Incentive Plan during the year ended December 31, 2012, is presented below:

	Unvested Shares			Weighted-Average Grant Date Fair Value Per Share
Outstanding at December 31, 2011		1,393,009		$	22.79
Granted		635,266			31.52
Forfeited		(47,568	)		26.92
Vested and Issued		(591,165	)		23.10
Vested and Unissued		(71,744	)		26.35
Outstanding at December 31, 2012		1,317,798			26.34

Summary of Stock Option Activity and Related Information

A summary of the Company’s stock option activity and related information during the year ended December 31, 2012, is presented below:

	Number of Shares (Options)			Weighted Average Exercise Price
Outstanding as of December 31, 2011		813,767		$	12.89
Granted		—			—
Forfeited		—			—
Exercised		(328,973	)		12.33
Outstanding as of December 31, 2012		484,794			13.26

Stock Options Outstanding

The following table summarizes information about stock options outstanding as of December 31, 2012:

	Options Outstanding							Options Vested and Exercisable
Exercise Price		Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)
$9.00 to $12.00			197,980	$	10.85		0.9		197,980	$	10.85		0.9
$12.01 to $15.00			184,126		14.63		2.1		184,126		14.63		2.1
$15.01 to $17.00			102,688		15.45		3.1		102,688		15.45		3.1
			484,794		13.26		1.8		484,794		13.26		1.8

Summary of Warrant Activity

A summary of warrant activity during the year ended December 31, 2012, is presented below:

	Warrants			Weighted-Average Exercise Price
Outstanding at December 31, 2011		50,200		$	25.83
Granted		75,006			31.94
Forfeited		(960	)		21.25
Exercised		(3,757	)		21.73
Outstanding at December 31, 2012		120,489			29.80

Summarized Information about Warrants Outstanding

The following table summarizes information about warrants outstanding as of December 31, 2012 and 2011:

	Warrants				Fair Value of Warrants		Outstanding at December 31,
Grant Date	Issued		Exercise Price		Issued		2012		2011
Throughout 2007		21,206	$	19.80 to $22.68	$	123		—		1,391
Throughout 2008		13,901	$	18.97 to $22.70		79		—		—
Throughout 2009		5,589	$	14.67 to $19.61		22		713		1,735
Throughout 2010		51,627	$	20.64 to $27.41		351		35,446		37,750
Throughout 2011		9,324	$	27.53 to $33.14		79		9,324		9,324
Throughout 2012		75,006	$	30.52 to $33.79		628		75,006		—
								120,489		50,200