MARKETABLE SECURITIES (Tables)

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of marketable securities

Marketable securities consisted of the following (in thousands):

	September 30, 2016		December 31, 2015
Marketable other than equity securities:
Commercial paper	$	37,251	$	31,864
Corporate debt securities	173,669		125,547
Securities of government sponsored entities	39,488		34,388
Total Marketable Securities:	$	250,408	$	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 September 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	$	37,302	$	—	$	(51	)	$	37,251
Corporate debt securities	Less than 1	96,929		18		(57		)	96,890
Securities of government-sponsored entities	Less than 1	9,500		—		—			9,500
Total maturity less than 1 year		143,731		18		(108		)	143,641
Corporate debt securities	1 to 2	76,909		24		(154		)	76,779
Securities of government-sponsored entities	1 to 2	30,012		—		(24		)	29,988
Total maturity 1 to 2 years		106,921		24		(178		)	106,767
Total available-for-sale securities		$	250,652	$	42	$	(286	)	$	250,408

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