EARNINGS PER SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
EARNINGS PER SHARE [Abstract]
Conversion of Class B Common Shares Rate	1.075
Basic (loss)/earnings per share calculation:
Net (loss)/income to common stockholders	$ (8,212)	$ 5,649
Weighted average number of common shares outstanding (in shares)	22,971	22,969
Basic net (loss)/income per share (in dollars per share)	$ (0.36)	$ 0.25
Diluted (loss)/earnings per share calculation:
Net (loss)/income to common stockholders	$ (8,212)	$ 5,649
Weighted average number of common shares outstanding (in shares)	22,971	22,969
Assumed conversion of Class B Stock (in shares)	0	219
Effect of dilutive stock options (in shares)	0	70
Diluted weighted average number of common shares outstanding (in shares)	22,971	23,258
Diluted net (loss)/income per share (in dollars per share)	$ (0.36)	$ 0.24