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Marketable Securities (Tables) | 6 Months Ended
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Jun. 28, 2025
Marketable Securities. |
Schedule Of Marketable Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(amounts in thousands) | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
June 28, 2025 |  | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Level 1 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 6,898
Level 2 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Corporate and municipal bonds | ​ | $ | 125,425 | ​ | $ | 2,007 | ​ | $ | (7,458) | ​ | ​ | 119,974
Total | ​ | $ | 125,425 | ​ | $ | 2,007 | ​ | $ | (7,458) | ​ | $ | 126,872
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | 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
Schedule Of Maturities Of Marketable Securities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Fair
(amounts in thousands) |  | Cost |  | Value
Available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​
Due within one year | ​ | $ | 11,642 | ​ | $ | 11,581
Due after one year through five years | ​ | ​ | 51,372 | ​ | ​ | 49,622
Due after five years through ten years | ​ | ​ | 11,153 | ​ | ​ | 10,488
Due after ten years | ​ | ​ | 51,258 | ​ | ​ | 48,283
Total | ​ | $ | 125,425 | ​ | $ | 119,974
​

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