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CONVERTIBLE SENIOR NOTES (Tables)

12 Months Ended

Dec. 31, 2012

CONVERTIBLE SENIOR NOTES

Schedule of carrying amounts of the liability and equity components of the convertible notes

		December 31, 2012			December 31,2011
Carrying amount of the equity component (additional paid-in capital)		$	24,375		$	24,375
Principal amount of the 2010 Notes		125,000			125,000
Unamortized discount of the liability component		14,082			18,619
Net carrying amount of the liability component		110,918			106,381

Schedule of effective interest rate, cash and non-cash interest expense and deferred financing cost amortization

		Years Ended December 31,
		2012			2011			2010
Effective interest rate on liability component		10.0		%	10.0		%	10.0		%
Cash interest expense recognized		$	6,263		$	6,231		$	2,662
Non-cash interest expense recognized		4,537			4,072			1,684
Non-cash deferred financing amortization costs included in interest expense		722			720			311

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Tabular disclosure of the details of the effective interest rate, interest expense and discount amortization related to convertible notes of the entity as well as deferred financing cost amortization.

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Tabular disclosure of information about the debt and equity components of convertible debt instruments.

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