XML 42 R31.htm IDEA: XBRL DOCUMENT

Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2016

Marketable Securities [Abstract]

Amortized Cost And Fair Value Of Marketable Securities


As of September 30, 2016			Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value

Corporate bonds		$	142,656		$	87		$	(63)		$	142,680
Certificates of deposit			32,149			-			-			32,149
Asset backed securities			29,147			79			-			29,226
Commercial paper			21,826			-			-			21,826
U.S. government bonds			14,112			11			(4)			14,119
Municipal bonds			1,400			2			-			1,402
Total marketable securities		$	241,290		$	179		$	(67)		$	241,402

As of December 31, 2015			Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value

Corporate bonds		$	177,810		$	24		$	(221)		$	177,613
U.S. government bonds			12,881			-			(10)			12,871
Agency bonds			12,068			-			(3)			12,065
Certificates of deposit			3,500			-			-			3,500
Commercial paper			3,491			-			-			3,491
International government bonds			1,462			-			(3)			1,459
Municipal bonds			1,400			-			(1)			1,399
Treasury bill			1,192			1			-			1,193
Total marketable securities		$	213,804		$	25		$	(238)		$	213,591

Contractual Maturities Of Marketable Securities


As of September 30, 2016			Amortized Cost			Fair Value

Due in one year or less		$	206,388		$	206,470
Due after one year through three years			34,902			34,932
		$	241,290		$	241,402