Marketable Securities (Tables)

6 Months Ended

Jun. 26, 2022

Investments, Debt and Equity Securities [Abstract]

Schedule of Amortized Cost, Gross Unrealized Gains and Losses, and Fair Market Value of AFS Securities

The following tables present the amortized cost, gross unrealized gains and losses, and fair market value of our AFS securities as of June 26, 2022, and December 26, 2021:

	June 26, 2022
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Short-term AFS securities
U.S. Treasury securities	$	35,776	$	2	$	(408)	$	35,370
Corporate debt securities	19,922		—		(289)		19,633
Municipal securities	7,033		—		(125)		6,908
Total short-term AFS securities	$	62,731	$	2	$	(822)	$	61,911
Long-term AFS securities
Corporate debt securities	$	157,376	$	—	$	(7,507)	$	149,869
U.S. Treasury securities	50,858		—		(2,127)		48,731
U.S. governmental agency securities	28,804		—		(1,003)		27,801
Municipal securities	3,890		—		(118)		3,772
Total long-term AFS securities	$	240,928	$	—	$	(10,755)	$	230,173

	December 26, 2021
(In thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Short-term AFS securities
U.S. Treasury securities	$	148,899	$	692	$	(43)	$	149,548
Corporate debt securities	107,158		245		(69)		107,334
Certificates of deposit	55,551		—		—		55,551
Commercial paper	21,145		—		—		21,145
Municipal securities	3,999		—		(2)		3,997
U.S. governmental agency securities	3,500		—		—		3,500
Total short-term AFS securities	$	340,252	$	937	$	(114)	$	341,075
Long-term AFS securities
Corporate debt securities	$	242,764	$	149	$	(1,858)	$	241,055
U.S. Treasury securities	119,695		—		(549)		119,146
U.S. governmental agency securities	39,498		—		(252)		39,246
Municipal securities	13,994		—		(61)		13,933
Total long-term AFS securities	$	415,951	$	149	$	(2,720)	$	413,380

Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value

The following tables represent the AFS securities as of June 26, 2022, and December 26, 2021, that were in an unrealized loss position for which an allowance for credit losses has not been recorded, aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position:

	June 26, 2022
	Less than 12 Months				12 Months or Greater				Total
(In thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Short-term AFS securities
U.S. Treasury securities	$	30,842	$	(408)	$	—	$	—	$	30,842	$	(408)
Corporate debt securities	19,633		(289)		—		—		19,633		(289)
Municipal securities	6,908		(125)		—		—		6,908		(125)
Total short-term AFS securities	$	57,383	$	(822)	$	—	$	—	$	57,383	$	(822)
Long-term AFS securities
Corporate debt securities	$	138,137	$	(7,006)	$	11,732	$	(501)	$	149,869	$	(7,507)
U.S. Treasury securities	45,986		(2,023)		2,745		(104)		48,731		(2,127)
U.S. governmental agency securities	22,015		(789)		5,786		(214)		27,801		(1,003)
Municipal securities	3,772		(118)		—		—		3,772		(118)
Total long-term AFS securities	$	209,910	$	(9,936)	$	20,263	$	(819)	$	230,173	$	(10,755)

	December 26, 2021
	Less than 12 Months				12 Months or Greater				Total
(In thousands)	Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses		Fair Value		Gross Unrealized Losses
Short-term AFS securities
U.S. Treasury securities	$	61,018	$	(43)	$	—	$	—	$	61,018	$	(43)
Corporate debt securities	53,148		(69)		—		—		53,148		(69)
Municipal securities	1,998		(2)		—		—		1,998		(2)
Total short-term AFS securities	$	116,164	$	(114)	$	—	$	—	$	116,164	$	(114)
Long-term AFS securities
Corporate debt securities	$	224,022	$	(1,858)	$	—	$	—	$	224,022	$	(1,858)
U.S. Treasury securities	119,146		(549)		—		—		119,146		(549)
U.S. governmental agency securities	39,246		(252)		—		—		39,246		(252)
Municipal securities	13,933		(61)		—		—		13,933		(61)
Total long-term AFS securities	$	396,347	$	(2,720)	$	—	$	—	$	396,347	$	(2,720)