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Marketable Securities (Tables)
 12 Months Ended
Dec. 31, 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 December 31, 2022, and December 26, 2021:
December 31, 2022
(In thousands)Amortized CostGross unrealized gainsGross unrealized lossesFair Value
Short-term AFS securities
Corporate debt securities$52,315 $— $(1,286)$51,029 
U.S. Treasury securities45,096 — (963)44,133 
U.S. governmental agency securities22,806 — (722)22,084 
Municipal securities8,903 — (177)8,726 
Total short-term AFS securities$129,120 $— $(3,148)$125,972 
Long-term AFS securities
Corporate debt securities$115,207 $— $(6,377)$108,830 
U.S. Treasury securities25,990 — (1,576)24,414 
U.S. governmental agency securities5,999 — (326)5,673 
Total long-term AFS securities$147,196 $— $(8,279)$138,917 
December 26, 2021
(In thousands)Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Short-term AFS securities
Corporate debt securities$107,158 $245 $(69)$107,334 
U.S Treasury securities148,899 692 (43)149,548 
U.S. governmental agency securities3,500 — — 3,500 
Municipal securities3,999 — (2)3,997 
Certificates of deposit55,551 — — 55,551 
Commercial paper21,145 — — 21,145 
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 securities119,695 — (549)119,146 
U.S. governmental agency securities39,498 — (252)39,246 
Municipal securities13,994 — (61)13,933 
Total long-term AFS securities$415,951 $149 $(2,720)$413,380 
Schedule of AFS Securities in Unrealized Loss Position
The following tables present the AFS securities as of December 31, 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 loss position:
December 31, 2022
Less than 12 Months12 Months or GreaterTotal
(In thousands)Fair ValueGross unrealized lossesFair ValueGross unrealized lossesFair ValueGross unrealized losses
Short-term AFS securities
Corporate debt securities$3,799 $(11)$47,230 $(1,275)$51,029 $(1,286)
U.S. Treasury securities— — 44,133 (963)44,133 (963)
U.S. governmental agency securities— — 22,084 (722)22,084 (722)
Municipal securities— — 8,726 (177)8,726 (177)
Total short-term AFS securities$3,799 $(11)$122,173 $(3,137)$125,972 $(3,148)
Long-term AFS securities
Corporate debt securities$2,004 $(57)$106,826 $(6,320)$108,830 $(6,377)
U.S. Treasury securities282 (9)24,132 (1,567)24,414 (1,576)
U.S. governmental agency securities— — 5,673 (326)5,673 (326)
Municipal securities— — — — — — 
Total long-term AFS securities$2,286 $(66)$136,631 $(8,213)$138,917 $(8,279)
December 26, 2021
Less than 12 Months12 Months or GreaterTotal
(In thousands)Fair ValueGross unrealized lossesFair ValueGross unrealized lossesFair ValueGross unrealized losses
Short-term AFS securities
Corporate debt securities$53,148 $(69)$— $— $53,148 $(69)
U.S. Treasury securities61,018 (43)— — 61,018 (43)
Municipal securities1,998 (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 securities119,146 (549)— — 119,146 (549)
U.S. governmental agency securities39,246 (252)— — 39,246 (252)
Municipal securities13,933 (61)— — 13,933 (61)
Total long-term AFS securities$396,347 $(2,720)$— $— $396,347 $(2,720)