EARNINGS (LOSS) PER SHARE (Computation of basic and diluted earnings (loss) per share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Earnings (loss) per share (EPS):
Basic (per share)	$ (0.07)		$ 0.11		$ (0.16)		$ 0.24
Diluted (per share)	$ (0.07)		$ 0.11		$ (0.16)		$ 0.24
EPS numerator - basic and diluted:
Net income (loss)	$ (2,165)		$ 3,382		$ (4,992)		$ 7,600
EPS denominator:
Weighted-average common stock outstanding - basic (in shares)	32,156		31,620		32,024		31,541
Common stock equivalents: stock options and other stock-based awards (a)	0	[1]	465	[1]	0	[1]	447	[1]
Weighted-average number of common stock outstanding - diluted (in shares)	32,156		32,085		32,024		31,988

[1] For the periods in which net losses are presented, the diluted weighted average number of shares of common stock outstanding did not differ from the basic weighted average number of shares of common stock outstanding because the effects of any potential common stock equivalents (see Note 5 for further details on outstanding stock options, non-vested restricted stock units and non-vested restricted stock) were anti-dilutive and therefore not included in the calculation of the denominator of dilutive earnings per share.