Retirement Plans (Narrative) (Details) $ in Thousands	12 Months Ended
Dec. 26, 2015 USD ($)	Dec. 27, 2014 USD ($)
Retirement Plans [Abstract]
Number of supplemental retirement plans	3
Retirement Plans, Accumulated Benefit Obligation	$ 9,079	$ 9,646
Deferred Compensation Arrangement with Individual, Requisite Service Period	6 years

Minimum period the individual is required to perform services to be fully vested under the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 710
-SubTopic 10
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Balance Type:	na
Period Type:	duration