MARKETABLE SECURITIES (Tables)

12 Months Ended

Dec. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of marketable securities

Marketable securities consist of the following (in thousands):

	December 31,
	2015		2014
Marketable Equity Securities:
Common Stock	$	—	$	9,556
Marketable Other than Equity Securities:
Commercial paper	31,864		—
Corporate debt securities	125,547		—
Securities of government sponsored entities	34,388		—
Total Marketable Securities:	$	191,799	$	9,556

Schedule of available for sale securities

The following is a summary of short-term marketable securities classified as available-for-sale as of December 31, 2015 (in thousands):

	Contractual Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses			Aggregate Estimated Fair Value
Marketable Other than Equity Securities:
Commercial paper	Less than 1	$	31,899	$	6	$	(41	)	$	31,864
Corporate debt securities	Less than 1	43,464		—		(78		)	43,386
Total maturity less than 1 year		75,363		6		(119		)	75,250
Corporate debt securities	1 to 2	82,557		—		(396		)	82,161
Securities of government-sponsored entities	1 to 2	34,522		2		(136		)	34,388
Total maturity 1 to 2 years		117,079		2		(532		)	116,549
Total available-for-sale securities		$	192,442	$	8	$	(651	)	$	191,799

The following is a summary of short-term marketable securities classified as available-for-sale as of December 31, 2014 (in thousands):

	Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Marketable Equity Securities:
Common Stock	$	5,160	$	4,499	$	(103	)	$	9,556
Total available-for-sale securities	$	5,160	$	4,499	$	(103	)	$	9,556