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Marketable Securities (Tables) | 12 Months Ended
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Dec. 26, 2020
Marketable Securities [Abstract] |
Schedule Of Marketable Securities | Marketable securities, as of December 26, 2020 and December 28, 2019, consisted of:
|  |  |  | Gross |  | Gross |  |  |
(dollars in thousands) | Amortized |  | Unrealized |  | Unrealized |  | Fair
December 26, 2020 | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |
Level 1 |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  |  |  |  |  |  |  |  | $ | 7,410
Level 2 |  |  |  |  |  |  |  |  |  |  |
Corporate and municipal bonds | $ | 99,861 |  | $ | 5,723 |  | $ | (1,139) |  |  | 104,445
| $ | 99,861 |  | $ | 5,723 |  | $ | (1,139) |  | $ | 111,855
|  |  |  | Gross |  | Gross |  |  |
(dollars in thousands) | Amortized |  | Unrealized |  | Unrealized |  | Fair
December 28, 2019 | Cost |  | Holding Gains |  | Holding Losses |  | Value
Available-for-sale: |  |  |  |  |  |  |  |  |  |  |
Level 1 |  |  |  |  |  |  |  |  |  |  |
Equity securities |  |  |  |  |  |  |  |  |  | $ | 9,201
Level 2 |  |  |  |  |  |  |  |  |  |  |
Corporate and municipal bonds | $ | 52,264 |  | $ | 2,091 |  | $ | (18) |  |  | 54,337
| $ | 52,264 |  | $ | 2,091 |  | $ | (18) |  | $ | 63,538
Schedule Of Maturities Of Marketable Securities | Maturities of marketable securities classified as available-for-sale at December 26, 2020, were as follows:
|  | Amortized |  |  | Fair
(dollars in thousands) |  | Cost |  |  | Value
Available-for-sale: |  |  |  |  |
Due within one year | $ | 9,146 |  | $ | 9,233
Due after one year through five years |  | 44,030 |  |  | 45,788
Due after five years through ten years |  | 46,685 |  |  | 49,424
| $ | 99,861 |  | $ | 104,445

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