MARKETABLE SECURITIES (Tables)

6 Months Ended

Jun. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of marketable securities

Marketable securities consisted of the following (in thousands):

	June 30, 2016		December 31, 2015
Marketable other than equity securities:
Commercial paper	$	40,823	$	31,864
Corporate debt securities	130,023		125,547
Securities of government sponsored entities	29,513		34,388
Total Marketable Securities:	$	200,359	$	191,799

Schedule of available for sale securities

The following is a summary of short-term marketable securities classified as available-for-sale as of June 30, 2016 (in thousands):

	Remaining Contractual Maturity (in years)	Amortized Cost		Unrealized Gains		Unrealized Losses			Aggregate Estimated Fair Value
Marketable other than equity securities:
Commercial paper	Less than 1	$	40,841	$	2	$	(20	)	$	40,823
Corporate debt securities	Less than 1	92,226		26		(25		)	92,227
Securities of government-sponsored entities	Less than 1	5,000		—		—			5,000
Total maturity less than 1 year		138,067		28		(45		)	138,050
Corporate debt securities	1 to 2	37,718		103		(25		)	37,796
Securities of government-sponsored entities	1 to 2	24,511		3		(1		)	24,513
Total maturity 1 to 2 years		62,229		106		(26		)	62,309
Total available-for-sale securities		$	200,296	$	134	$	(71	)	$	200,359

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

	Remaining 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	69,859		—		(164		)	69,695
Total maturity less than 1 year		101,758		6		(205		)	101,559
Corporate debt securities	1 to 2	56,162		—		(310		)	55,852
Securities of government-sponsored entities	1 to 2	34,522		2		(136		)	34,388
Total maturity 1 to 2 years		90,684		2		(446		)	90,240
Total available-for-sale securities		$	192,442	$	8	$	(651	)	$	191,799