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Marketable Securities (Tables)

6 Months Ended

Jun. 27, 2020

Investments Debt And Equity Securities [Abstract]

Schedule of Marketable Securities Classified as Available-for-sale Securities

Marketable securities classified as available-for-sale securities are summarized below:

		Available-For-Sale Securities as of June 27, 2020
		Fair Value Level		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		Level 2		$	12,262			$	63			$	—			$	12,325
Agency securities		Level 2			16,499				146				—				16,645
Mortgage-backed securities		Level 2			207,545				1,321				(2,729	)			206,137
Corporate securities		Level 2			874,247				24,767				(1,878	)			897,136
Municipal securities		Level 2			170,227				3,416				(88	)			173,555
Other		Level 2			72,076				116				(4,089	)			68,103
Total				$	1,352,856			$	29,829			$	(8,784	)		$	1,373,901

		Available-For-Sale Securities as of December 28, 2019
		Fair Value Level		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		Level 2		$	15,204			$	5			$	(30	)		$	15,179
Agency securities		Level 2			64,582				120				(27	)			64,675
Mortgage-backed securities		Level 2			256,417				90				(2,485	)			254,022
Corporate securities		Level 2			980,590				8,806				(3,746	)			985,650
Municipal securities		Level 2			163,898				1,092				(235	)			164,755
Other		Level 2			98,246				111				(700	)			97,657
Total				$	1,578,937			$	10,224			$	(7,223	)		$	1,581,938

Schedule of Gross Unrealized Losses and Fair Value by Major Security Type

The following tables display additional information regarding gross unrealized losses and fair value by major security type for available-for-sale securities in an unrealized loss position as of June 27, 2020 and December 28, 2019.

		As of June 27, 2020
		Less than 12 Consecutive Months								12 Consecutive Months or Longer								Total
		Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		$	—			$	—			$	—			$	—			$	—			$	—
Agency securities			—				—				—				—				—				—
Mortgage-backed securities			(2,604	)			117,813				(125	)			3,078				(2,729	)			120,891
Corporate securities			(777	)			69,985				(1,101	)			18,432				(1,878	)			88,417
Municipal securities			(88	)			21,417				—				—				(88	)			21,417
Other			(3,383	)			51,234				(706	)			3,844				(4,089	)			55,078
Total		$	(6,852	)		$	260,449			$	(1,932	)		$	25,354			$	(8,784	)		$	285,803

		As of December 28, 2019
		Less than 12 Consecutive Months								12 Consecutive Months or Longer								Total
		Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		$	—			$	—			$	(30	)		$	13,087			$	(30	)		$	13,087
Agency securities			(16	)			20,808				(11	)			20,812				(27	)			41,620
Mortgage-backed securities			(745	)			79,007				(1,740	)			86,392				(2,485	)			165,399
Corporate securities			(1,585	)			183,691				(2,161	)			100,926				(3,746	)			284,617
Municipal securities			(218	)			34,165				(17	)			9,522				(235	)			43,687
Other			(410	)			34,540				(290	)			21,559				(700	)			56,099
Total		$	(2,974	)		$	352,211			$	(4,249	)		$	252,298			$	(7,223	)		$	604,509

Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity

The amortized cost and fair value of marketable securities at June 27, 2020, by maturity, are shown below.

		Amortized Cost				Fair Value
Due in one year or less		$	380,256			$	380,880
Due after one year through five years			849,952				868,799
Due after five years through ten years			115,855				118,061
Due after ten years			6,793				6,161
		$	1,352,856			$	1,373,901

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- Definition

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

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/topic&trid=2196928

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Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments.

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For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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