NET INCOME PER SHARE NET INCOME (LOSS) PER SHARE (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	4,759	5,321	5,985	5,707
Options
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	4,705	4,999	5,902	5,328
Non-vested restricted stock units
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]
Anti-dilutive potential common shares (in thousands of shares)	54	322	83	379