STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Details 6) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share
Excluded from the computation of diluted EPS (in shares)				5,573
Stock Options
Antidilutive Securities Excluded from Computation of Earnings Per Share
Excluded from the computation of diluted EPS (in shares)	340		857	1,043
Restricted Stock Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share
Excluded from the computation of diluted EPS (in shares)	5	[1]	317	326

[1] On April 1, 2012, the Company revised its calculation of earnings per share to account for participating securities under the two-class method. This revision to the earnings per share calculation does not have an impact to previous periods as the amounts are immaterial.