The per share amount of a dividend declared, but not paid, as of the financial reporting date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: 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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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Equity Compensation - RSU's (Details) - USD ($)	12 Months Ended
Equity Compensation - RSU's (Details) - USD ($)	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014	Feb. 14, 2017
Equity Compensation
Dividends declared to holders of time-based restricted stock (in dollars per share)				$ 0.20
Award vesting period, in years	3 years
Restricted Stock
Equity Compensation
Restricted Shares, Granted	99,000
Time based restricted stock
Equity Compensation
Restricted Shares, Granted	85,000	76,000	89,000
Dividends declared to holders of time-based restricted stock (in dollars)	$ 117,000	$ 110,000	$ 128,000
Dividends declared to holders of time-based restricted stock (in dollars per share)	$ 0.75	$ 0.63	$ 0.53
Award vesting period, in years	3 years	3 years	3 years
Performance based restricted stock units \| Executive Management
Equity Compensation
Restricted Shares, Granted	14,000	12,000	17,000
Award vesting period, in years	3 years