EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Basic earnings (loss) per share, numerator:
Net income (loss)	$ 4,878	$ 11,841	$ (8,517)	$ (6,321)
Effect of unvested restricted stock awards	(215)	(549)	(74)	(75)
Adjusted net income (loss)	4,663	11,292	(8,591)	(6,396)
Basic earnings (loss) per share, denominator:
Weighted-average shares	25,694,327	25,544,455	25,666,484	25,496,871
Earnings (loss) per common share (in dollars per share)	$ 0.18	$ 0.44	$ (0.33)	$ (0.25)
Diluted earnings (loss) per share, numerator:
Net income (loss)	4,878	11,841	(8,517)	(6,321)
Effect of unvested restricted stock awards	(215)	(549)	(74)	(75)
Adjusted net income (loss)	$ 4,663	$ 11,292	$ (8,591)	$ (6,396)
Diluted earnings (loss) per share, denominator:
Weighted-average shares	25,694,327	25,544,455	25,666,484	25,496,871
Adjusted weighted-average shares and assumed conversions	25,694,327	25,544,455	25,666,484	25,496,871
Earnings (loss) per common share (in dollars per share)	$ 0.18	$ 0.44	$ (0.33)	$ (0.25)
Outstanding stock awards not included in calculation of diluted loss per share (in units)	700,000	900,000	700,000	800,000