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CONVERTIBLE SENIOR NOTES (Tables)

9 Months Ended

Sep. 30, 2013

CONVERTIBLE SENIOR NOTES [Abstract]

Liability and Equity Components of Convertible Notes

The following tables provide additional information about the Company’s 2010 Notes:

		September 30, 2013				December 31, 2012
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			10,429				14,082
Net carrying amount of the liability component			114,571				110,918

Effective Interest Rate, Cash and Non-cash Interest Expense and Deferred Financing Cost Amortization

For the Three Months Ended September 30,								For the Nine Months Ended September 30,
		2013				2012				2013				2012
Effective interest rate on liability component			10.0	%			10.0	%			10.0	%			10.0	%
Cash interest expense recognized		$	1,575			$	1,580			$	4,687			$	4,696
Non-cash interest expense recognized			1,265				1,158				3,653				3,345
Non-cash deferred financing amortization costs included in interest expense			181				181				537				540