MARKETABLE SECURITIES (Detail Textuals)	6 Months Ended
	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Period of current marketable securities	less than 12 months
Period of non-current marketable securities	greater than 12 months
Maturity term of non-current marketable securities	2014 and 2041
Municipal obligations | A3 or higher
Schedule of Available-for-sale Securities [Line Items]
Period of maturity of debt obligations	less than one year to over 10 years
Corporate obligations | A2 or higher
Schedule of Available-for-sale Securities [Line Items]
Period of maturity of debt obligations	one to two years