EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic loss per share, numerator:
Net loss	$ (13,395)	$ (18,162)
Effect of unvested restricted stock awards	(38)	(34)
Adjusted net loss	(13,433)	(18,196)
Basic loss per share, denominator:
Weighted-average shares	25,638,333	25,455,607
Loss per common share (in dollars per share)	$ (0.52)	$ (0.71)
Diluted loss per share, numerator:
Net loss	(13,395)	(18,162)
Effect of unvested restricted stock awards	(38)	(34)
Adjusted net loss	$ (13,433)	$ (18,196)
Diluted loss per share, denominator:
Weighted-average shares	25,638,333	25,455,607
Adjusted weighted-average shares and assumed conversions	25,638,333	25,455,607
Loss per common share (in dollars per share)	$ (0.52)	$ (0.71)
Outstanding stock awards not included in calculation of diluted loss per share (in shares)	700,000	800,000