CONVERTIBLE SENIOR NOTES (Tables)

12 Months Ended

Dec. 31, 2013

CONVERTIBLE SENIOR NOTES [Abstract]

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

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

	December 31, 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		9,119		14,082
Net carrying amount of the liability component		115,881		110,918

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

	Years Ended December 31,
	2013			2012			2011
Effective interest rate on liability component		10.0	%		10.0	%		10.0	%
Cash interest expense recognized	$	6,250		$	6,263		$	6,231
Non-cash interest expense recognized		4,963			4,537			4,072
Non-cash deferred financing amortization costs included in interest expense		720			722			720