LOSS/EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
LOSS/EARNINGS PER SHARE [Abstract]
Number of methods used for calculating earnings per share			2
Conversion of Class B common shares rate			1.075
Antidilutive common shares excluded from computation of earnings per share		88,764		29,588
Basic earnings per share calculation [Abstract]
Net (loss)/income to common stockholders	$ (4,042)	$ 5,763	$ (23,502)	$ 17,050
Weighted average number of common shares outstanding (in shares)	22,970,000	22,962,000	22,970,000	22,951,000
Basic net (loss)/income per share (in dollars per share)	$ (0.18)	$ 0.25	$ (1.02)	$ 0.74
Diluted earnings per share calculation [Abstract]
Net (loss)/income to common stockholders	$ (4,042)	$ 5,763	$ (23,502)	$ 17,050
Weighted average number of common shares outstanding (in shares)	22,970,000	22,962,000	22,970,000	22,951,000
Assumed conversion of Class B shares (in shares)	0	220,000	0	221,000
Effect of dilutive stock options (in shares)	0	54,000	0	89,000
Diluted weighted average number of common shares outstanding (in shares)	22,970,000	23,236,000	22,970,000	23,261,000
Diluted net (loss)/income per share	$ (0.18)	$ 0.25	$ (1.02)	$ 0.73