EARNINGS (LOSS) PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Basic and diluted net earnings per share
Net earnings applicable to common shareholders	$ 2,826	$ 3,808
Weighted average shares outstanding - basic	71,991,863	71,025,089
Effect of dilutive securities - restricted stock	63,285
Effect of dilutive securities - stock options	630,291	1,169,211
Weighted average shares outstanding - diluted	72,685,439	72,194,300
Basic net earnings per share (in dollars per share)	$ 0.04	$ 0.05
Diluted net earnings per share (in dollars per share)	$ 0.04	$ 0.05
Convertible bonds and preferred stock
Earnings (loss) per share
Anti-dilutive securities (in shares)	38,072	52,522
Stock options and restricted stock
Earnings (loss) per share
Anti-dilutive securities (in shares)	2,233,329	1,002,979
Convertible debentures
Earnings (loss) per share
Percentage of principal amount at which debentures may be converted from the date of issuance until maturity into common stock	100.00%
Conversion price (in dollars per share)	$ 50