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Marketable Securities (Tables) | 12 Months Ended
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Dec. 28, 2024
Marketable Securities. |
Schedule Of Marketable Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(amounts in thousands) | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 28, 2024 |  | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 5,930
Level 2 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and municipal bonds | ​ | $ | 171,258 | ​ | $ | 2,525 | ​ | $ | (6,583) | ​ | ​ | 167,201
Commercial Paper | ​ | ​ | 18,671 | ​ | ​ | 169 | ​ | ​ | — | ​ | ​ | 18,840
Total | ​ | $ | 189,930 | ​ | $ | 2,695 | ​ | $ | (6,583) | ​ | $ | 191,971
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(amounts in thousands) | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
December 30, 2023 |  | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 4,910
Level 2 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and municipal bonds | ​ | $ | 177,972 | ​ | $ | 3,853 | ​ | $ | (6,553) | ​ | ​ | 175,272
Commercial paper | ​ | ​ | 44,732 | ​ | ​ | 1,076 | ​ | ​ | — | ​ | ​ | 45,808
Total | ​ | $ | 222,704 | ​ | $ | 4,929 | ​ | $ | (6,553) | ​ | $ | 225,991
​
Schedule Of Maturities Of Marketable Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair
(amounts in thousands) |  | Cost |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​
Due within one year | ​ | $ | 69,258 | ​ | $ | 69,564
Due after one year through five years | ​ | ​ | 62,259 | ​ | ​ | 59,575
Due after five years through ten years | ​ | ​ | 12,787 | ​ | ​ | 11,899
Due after ten years | ​ | ​ | 45,626 | ​ | ​ | 45,004
Total | ​ | $ | 189,930 | ​ | $ | 186,041
​

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