SIGNIFICANT ACCOUNTING POLICIES (Schedule of Weighted Average Number of Shares Outstanding to Calculate Earnings (Loss) Per Share) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
SIGNIFICANT ACCOUNTING POLICIES [Abstract]
Weighted average common shares outstanding for basic calculation	92,297,522	91,526,224	92,241,505	89,702,496
Weighted average dilutive effect of stock options		3,354,943		2,967,537
Weighted average common shares outstanding for diluted calculation	92,297,522	94,881,167	92,241,505	92,670,033