Marketable Securities (Tables)

9 Months Ended

Sep. 29, 2018

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-Sale Securities Reconciliation

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


	September 29, 2018
	Amortized Cost		Unrealized Gain		Unrealized Loss			Fair Value
U.S. Treasury securities	$	272,812	$	—	$	(894	)	$	271,918
Foreign government securities		2,994		—		(36	)		2,958
Corporate debt securities		1,066,088		424		(3,130	)		1,063,382
Time deposits		179,271		—		—			179,271

Total	$	1,521,165	$	424	$	(4,060	)	$	1,517,529

Amounts included in:
Cash equivalents	$	122,645	$	—	$	(3	)	$	122,642
Investments		1,398,520		424		(4,057	)		1,394,887

Total	$	1,521,165	$	424	$	(4,060	)	$	1,517,529


	December 31, 2017
	Amortized		Unrealized		Unrealized			Fair
	Cost		Gain		Loss			Value
U.S. Treasury securities	$	593,599	$	82	$	(1,693	)	$	591,988
Foreign government securities		6,982		—		(30	)		6,952
Corporate debt securities		1,977,329		897		(3,066	)		1,975,160
Time deposits		371,515		—		(4	)		371,511
Equity securities		77		70		—			147

Total	$	2,949,502	$	1,049	$	(4,793	)	$	2,945,758

Amounts included in:
Cash equivalents	$	194,377	$	—	$	(1	)	$	194,376
Investments		2,755,125		1,049		(4,792	)		2,751,382

Total	$	2,949,502	$	1,049	$	(4,793	)	$	2,945,758

Investments Classified By Contractual Maturity Date

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


	September 29, 2018		December 31, 2017
Due in one year or less	$	1,043,082	$	1,722,553
Due after one year through three years		295,176		851,547

Total	$	1,338,258	$	2,574,100