Marketable Securities (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of Available-for-Sale Securities Reconciliation

3 Marketable Securities

The Company's marketable securities within cash equivalents and investments included in the consolidated balance sheets are detailed as follows (in thousands):

		December 31, 2015
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gain		Loss		Value
U.S. Treasury securities		$	628,358	$	16	$	(1,218)	$	627,156
Foreign government securities			15,216		-		(17)		15,199
Corporate debt securities			1,325,398		159		(1,239)		1,324,318
Time deposits			74,947		-		-		74,947
Equity securities			77		70		-		147
	Total	$	2,043,996	$	245	$	(2,474)	$	2,041,767

Amounts included in:
	Cash equivalents	$	130,169	$	-	$	-	$	130,169
	Investments		1,913,827		245		(2,474)		1,911,598
	Total	$	2,043,996	$	245	$	(2,474)	$	2,041,767

		December 31, 2014
		Amortized		Unrealized		Unrealized		Fair
		Cost		Gain		Loss		Value
U.S. Treasury securities		$	626,683	$	246	$	(157)	$	626,772
Foreign government securities			24,998		-		-		24,998
Corporate debt securities			984,668		125		(688)		984,105
Time deposits			64,240		-		-		64,240
Equity securities			77		70		-		147
	Total	$	1,700,666	$	441	$	(845)	$	1,700,262

Amounts included in:
	Cash equivalents	$	67,051	$	-	$	-	$	67,051
	Investments		1,633,615		441		(845)		1,633,211
	Total	$	1,700,666	$	441	$	(845)	$	1,700,262

Investments Classified By Contractual Maturity Date

The estimated fair value of marketable debt securities by maturity date is as follows (in thousands):

		December 31, 2015		December 31, 2014
Due in one year or less		$	1,137,825	$	872,872
Due after one year through three years			828,848		763,003
	Total	$	1,966,673	$	1,635,875