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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 30, 2017
Accumulated Other Comprehensive Income [Abstract] |
Schedule of Accumulated Other Comprehensive Income |
﻿ |  |
﻿ |  |
﻿ |  | Unrealized Gains
﻿ |  | on Available-for-Sale
﻿(dollars in thousands) |  | Marketable Securities
﻿Accumulated other comprehensive income balance as of December 26, 2015 | $ | 4,761
﻿ |  |
﻿ Other comprehensive income before reclassifications |  | 348
﻿ Amounts reclassified from accumulated other comprehensive income |  | (257)
﻿Net current period other comprehensive loss |  | 91
﻿Accumulated other comprehensive income balance as of December 31, 2016 | $ | 4,852
﻿ |  |
﻿Other comprehensive loss before reclassifications |  | (43)
﻿Accumulated change in effective tax rate |  | 1,042
﻿Amounts reclassified from accumulated other comprehensive income |  | 29
﻿Net current period other comprehensive income |  | 1,028
﻿Accumulated other comprehensive income balance as of December 30, 2017 | $ | 5,880
﻿
Schedule Of Reclassifications out of Accumulated Other Comprehensive Income |
﻿ |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |
﻿ |  | Amounts Reclassified from
﻿ |  | Accumulated Other Comprehensive Income to the
﻿ |  | Consolidated Statements of Income
﻿(dollars in thousands) | Location | 2017 | 2016 | 2015
﻿Unrealized gains (losses) on available-for-sale marketable securities |  |  |  |  |  |
﻿ | Investment income and interest expense | $ | (40) | $ | 437 | $ | 27
﻿ | Provision for income taxes |  | 11 |  | (180) |  | (11)
﻿Total amount reclassified, net of tax |  | $ | (29) | $ | 257 | $ | 16
﻿

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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=66004124&loc=SL7669686-108580 + Details
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