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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2015

Marketable Securities [Abstract]

Amortized Cost And Fair Value Of Marketable Securities


As of September 30, 2015			Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value

Corporate bonds		$	171,949		$	39		$	(150)		$	171,838
Agency bonds			18,108			3			-			18,111
U.S. government bonds			10,174			6			-			10,180
Certificates of deposit			3,400			-			-			3,400
Commercial paper			1,999			-			-			1,999
International government bonds			1,467			-			(1)			1,466
Municipal bonds			1,400			5			-			1,405
Total marketable securities		$	208,497		$	53		$	(151)		$	208,399

Contractual Maturities Of Marketable Securities


As of September 30, 2015			Amortized Cost			Fair Value

Due in one year or less		$	144,120		$	144,109
Due after one through two years			64,377			64,290
		$	208,497		$	208,399