WARRANTS (Tables)

12 Months Ended

Dec. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Reconciliation of Change in Value of Company's Warrants Liability

The following table summarizes the reconciliation of the change in value of the Company’s liability classified warrants for each of the periods indicated:

	For the Year Ended December 31,
	2014			2013			2012
	(in thousands)
Balance at beginning of the period	$	9,006		$	65,193		$	5,446
Increase in value of warrants		2,779			22,027			91,938
Reclassification to stockholders’ equity upon exercise of warrants		(11,785	)		(78,214	)		(32,191	)
Balance at end of the period	$	—		$	9,006		$	65,193

Summary of Warrant Activity

The following table summarizes the Company’s warrant activity for each of the periods indicated:

	For the Year Ended December 31,
	2014					2013					2012
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Warrants outstanding at beginning of the period		791,508		$	10.05		3,127,618		$	8.48		4,867,477		$	9.54
Exercised		(765,915	)		10.12		(2,336,110	)		7.96		(1,739,859	)		11.81
Canceled or expired		(25,593	)		7.92		—			—		—			—
		—		$	—		791,508		$	10.05		3,127,618		$	8.48