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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 26, 2015
Accumulated Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Unrealized Gains
|  | on Available-for-Sale
(dollars in thousands) |  | Marketable Securities
Accumulated other comprehensive income balance as of December 28, 2013 | $ | 3,939
Other comprehensive income before reclassifications |  | 927
Amounts reclassified from accumulated other comprehensive income |  | (37)
Net current period other comprehensive income |  | 890
Accumulated other comprehensive income balance as of December 27, 2014 | $ | 4,829
Other comprehensive loss before reclassifications |  | (52)
Amounts reclassified from accumulated other comprehensive income |  | (16)
Net current period other comprehensive loss |  | (68)
Accumulated other comprehensive income balance as of December 26, 2015 | $ | 4,761
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
|  | Gains Reclassified from
|  | Accumulated Other Comprehensive Income to the
|  | Consolidated Statements of Income
(dollars in thousands) | Location |  | 2015 |  | 2014 |  | 2013
Unrealized gains on available-for-sale marketable securities |  |  |  |  |  |  |
| Investment income | $ | 27 | $ | 63 | $ | 1,774
| Provision for income taxes |  | (11) |  | (26) |  | (730)
Total amount reclassified, net of tax |  | $ | 16 | $ | 37 | $ | 1,044

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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