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Investments (Tables) | 12 Months Ended
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Dec. 26, 2015
Investments [Abstract] |
Marketable securities [Table Text Block] | Marketable securities, as of December 26, 2015 and December 27, 2014, consisted of:
|  |  | Gross | Gross |  |
(dollars in thousands) | Amortized | Unrealized | Unrealized | Fair
December 26, 2015 | Cost | Holding Gains | Holding Losses | Value
Available-for-sale: |  |  |  |  |  |  |  |
Level 1 |  |  |  |  |  |  |  |
Equity securities | $ | 1,198 | $ | 6,682 | $ | - | $ | 7,880
Level 2 |  |  |  |  |  |  |  |
Municipal bonds |  | 82,347 |  | 1,468 |  | (66) |  | 83,749
| $ | 83,545 | $ | 8,150 | $ | (66) | $ | 91,629
|  |  | Gross | Gross |  |
(dollars in thousands) | Amortized | Unrealized | Unrealized | Fair
December 27, 2014 | Cost | Holding Gains | Holding Losses | Value
Available-for-sale: |  |  |  |  |  |  |  |
Level 1 |  |  |  |  |  |  |  |
Equity securities | $ | 1,198 | $ | 6,683 | $ | - | $ | 7,881
Level 2 |  |  |  |  |  |  |  |
Municipal bonds |  | 64,561 |  | 1,613 |  | (96) |  | 66,078
| $ | 65,759 | $ | 8,296 | $ | (96) | $ | 73,959
Maturities of marketable securities classified as available-for-sale [Table Text Block] |
|  | Amortized |  | Fair
(dollars in thousands) |  | Cost |  | Value
Available-for-sale: |  |  |  |
Due within one year | $ | 9,775 | $ | 9,839
Due after one year through five years |  | 52,426 |  | 53,285
Due after five years through ten years |  | 20,146 |  | 20,625
Equity securities |  | 1,198 |  | 7,880
| $ | 83,545 | $ | 91,629

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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