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Cash and Investments (Tables)

3 Months Ended

Mar. 29, 2019

Investments, Debt and Equity Securities [Abstract]

Reconciliation of Cash, Cash Equivalents, and Restricted Cash

A reconciliation of Cash, cash equivalents, and restricted cash reported within our Condensed Consolidated Balance Sheets to the amount reported within the accompanying Condensed Consolidated Statements of Cash Flows was as follows (in thousands):

	March 31, 2019				December 31, 2018				March 31, 2018				December 31, 2017
Cash and cash equivalents	$	373,937			$	314,775			$	232,331			$	183,164
Restricted cash included in short-term restricted cash and investments	—				—				504				504
Restricted cash included in long-term restricted cash and investments	1,100				1,100				1,500				4,646
Cash, cash equivalents, and restricted cash as reported within the accompanying Condensed Consolidated Statements of Cash Flows	$	375,037			$	315,875			$	234,335			$	188,314

Reconciliation of Cash, Cash Equivalents, and Restricted Cash

A reconciliation of Cash, cash equivalents, and restricted cash reported within our Condensed Consolidated Balance Sheets to the amount reported within the accompanying Condensed Consolidated Statements of Cash Flows was as follows (in thousands):

	March 31, 2019				December 31, 2018				March 31, 2018				December 31, 2017
Cash and cash equivalents	$	373,937			$	314,775			$	232,331			$	183,164
Restricted cash included in short-term restricted cash and investments	—				—				504				504
Restricted cash included in long-term restricted cash and investments	1,100				1,100				1,500				4,646
Cash, cash equivalents, and restricted cash as reported within the accompanying Condensed Consolidated Statements of Cash Flows	$	375,037			$	315,875			$	234,335			$	188,314

Investments by Security Type

Cash and investments by security type were as follows (in thousands):

	March 31, 2019
	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Investments available-for-sale:
Money market funds	$	75,171			$	—			$	—			$	75,171
Commercial paper	414,317				—				—				414,317
Corporate bonds	417,303				1,257				(175		)		418,385
U.S. Treasury and government sponsored enterprises	84,448				41				(2		)		84,487
Total investments available-for-sale	991,239				1,298				(177		)		992,360
Cash and restricted cash	1,019				—				—				1,019
Certificates of deposit	25,990				—				—				25,990
Total cash and investments	$	1,018,248			$	1,298			$	(177	)		$	1,019,369

	December 31, 2018
	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
Investments available-for-sale:
Money market funds	$	47,744			$	—			$	—			$	47,744
Commercial paper	381,134				—				(1		)		381,133
Corporate bonds	344,741				180				(857		)		344,064
U.S. Treasury and government sponsored enterprises	55,224				2				(25		)		55,201
Total investments available-for-sale	828,843				182				(883		)		828,142
Cash and restricted cash	6,883				—				—				6,883
Certificates of deposit	16,596				—				—				16,596
Total cash and investments	$	852,322			$	182			$	(883	)		$	851,621

Fair Value and Gross Unrealized Losses of Investments Available-for-Sale in an Unrealized Loss Position

The fair value and gross unrealized losses on investments available-for-sale in an unrealized loss position were as follows (in thousands):

	March 31, 2019
	In an Unrealized Loss Position Less than 12 Months								In an Unrealized Loss Position 12 Months or Greater								Total
	Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
Corporate bonds	$	49,233			$	(39	)		$	45,010			$	(136	)		$	94,243			$	(175	)
U.S. Treasury and government sponsored enterprises	—				—				7,990				(2		)		7,990				(2		)
Total	$	49,233			$	(39	)		$	53,000			$	(138	)		$	102,233			$	(177	)

	December 31, 2018
	In an Unrealized Loss Position Less than 12 Months								In an Unrealized Loss Position 12 Months or Greater								Total
	Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
Corporate bonds	$	236,162			$	(606	)		$	39,627			$	(251	)		$	275,789			$	(857	)
U.S. Treasury and government sponsored enterprises	28,105				(16		)		9,182				(9		)		37,287				(25		)
Commercial paper	7,091				(1		)		—				—				7,091				(1		)
Total	$	271,358			$	(623	)		$	48,809			$	(260	)		$	320,167			$	(883	)

Fair Value of Cash Equivalents and Investments by Contractual Maturity

The fair value of investments available-for-sale by contractual maturity were as follows (in thousands):

	March 31, 2019				December 31, 2018
Maturing in one year or less	$	784,432			$	674,455
Maturing after one year through five years	207,928				153,687
Total investments available-for-sale	$	992,360			$	828,142

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- Definition

Tabular disclosure of fair value amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position.

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