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Marketable Securities (Tables)

6 Months Ended

Jun. 26, 2021

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 26, 2021
		Fair Value Level		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		Level 2		$	400			$	3			$	—			$	403
Agency securities		Level 2			8,474				12				(29	)			8,457
Mortgage-backed securities		Level 2			173,372				818				(789	)			173,401
Corporate securities		Level 2			997,362				18,346				(4,294	)			1,011,414
Municipal securities		Level 2			301,919				2,872				(1,950	)			302,841
Other		Level 2			38,195				91				(530	)			37,756
Total				$	1,519,722			$	22,142			$	(7,592	)		$	1,534,272

		Available-For-Sale Securities as of December 26, 2020
		Fair Value Level		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
U.S. Treasury securities		Level 2		$	400			$	6			$	—			$	406
Agency securities		Level 2			5,954				56				—				6,010
Mortgage-backed securities		Level 2			239,445				1,051				(1,923	)			238,573
Corporate securities		Level 2			984,696				25,962				(1,637	)			1,009,021
Municipal securities		Level 2			214,515				3,644				(223	)			217,936
Other		Level 2			47,760				167				(1,056	)			46,871
Total				$	1,492,770			$	30,886			$	(4,839	)		$	1,518,817

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 26, 2021 and December 26, 2020.

		As of June 26, 2021
		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			(29	)			5,946				—				—				(29	)			5,946
Mortgage-backed securities			(195	)			17,387				(594	)			6,628				(789	)			24,015
Corporate securities			(4,236	)			360,009				(58	)			7,136				(4,294	)			367,145
Municipal securities			(1,950	)			156,686				—				—				(1,950	)			156,686
Other			(124	)			13,447				(406	)			10,159				(530	)			23,606
Total		$	(6,534	)		$	553,475			$	(1,058	)		$	23,923			$	(7,592	)		$	577,398

		As of December 26, 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			(1,849	)			85,688				(74	)			2,122				(1,923	)			87,810
Corporate securities			(1,065	)			199,187				(572	)			8,625				(1,637	)			207,812
Municipal securities			(223	)			50,403				—				—				(223	)			50,403
Other			(726	)			22,600				(330	)			3,426				(1,056	)			26,026
Total		$	(3,863	)		$	357,878			$	(976	)		$	14,173			$	(4,839	)		$	372,051

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 26, 2021, by maturity, are shown below.

		Amortized Cost				Fair Value
Due in one year or less		$	328,766			$	330,567
Due after one year through five years			1,123,801				1,136,623
Due after five years through ten years			63,817				63,783
Due after ten years			3,338				3,299
		$	1,519,722			$	1,534,272

X

- 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).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
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