MARKETABLE SECURITIES (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Current available-for-sale marketable securities
Amortized Cost	$ 78,748	$ 1,220
Gross Unrealized Gains	2,922	4,784
Gross Unrealized Losses	(59)	0
Marketable securities	81,611	6,004
Contractual maturities of debt securities classified as available-for-sale
Due in one year or less, amortized cost	10,632
Due after one year through five years, amortized cost	67,967
Total Amortized Cost	78,599
Due in one year or less, fair value	10,642
Due after one year through five years, fair value	67,939
Total, Estimated Fair Value	78,581
Total debt securities
Current available-for-sale marketable securities
Amortized Cost	78,599	1,004
Gross Unrealized Gains	41	4
Gross Unrealized Losses	(59)	0
Marketable securities	78,581	1,008
Corporate debt securities
Current available-for-sale marketable securities
Amortized Cost	78,599	1,004
Gross Unrealized Gains	41	4
Gross Unrealized Losses	(59)	0
Marketable securities	78,581	1,008
Equity securities
Current available-for-sale marketable securities
Amortized Cost	149	216
Gross Unrealized Gains	2,881	4,780
Gross Unrealized Losses	0	0
Marketable securities	$ 3,030	$ 4,996