MARKETABLE SECURITIES (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014 investment	Mar. 31, 2013	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year	4
Marketable securities	$ 39,543		$ 6,004
Available-for-sale Securities, Gross Unrealized Loss	(18)		0
Proceeds from maturities and sales of current and non-current available-for-sale marketable securities and related gross realized gains and losses
Proceeds from maturities and sales of available-for-sale marketable securities	0	12,500
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,174		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss	(18)	0
Marketable securities	33,961		1,008
Available-for-sale Securities, Gross Unrealized Loss	(18)		0
Total
Schedule of Available-for-sale Securities [Line Items]
Marketable securities	16,174		0
Available-for-sale Securities, Gross Unrealized Loss	$ (18)	$ 0