MARKETABLE SECURITIES (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
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	$ 41,976	$ 40,570	$ 54,478	$ 88,347
Gross realized gains	$ 17,977	$ 241	$ 17,977	$ 2,039