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Equity Compensation - RSU's (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 25, 2016 | Dec. 27, 2015
Equity Compensation |  |  |
Award vesting period, in years | 3 years |  |
Restricted Stock |  |  |
Equity Compensation |  |  |
Restricted Shares, Granted | 86,000 |  |
Time based restricted stock |  |  |
Equity Compensation |  |  |
Award vesting period, in years | 3 years | 3 years | 3 years
Restricted Shares, Granted | 73,000 | 85,000 | 76,000
Dividends declared to holders of time-based restricted stock (in dollars) | $ 128,000 | $ 117,000 | $ 110,000
Dividends declared to holders of time-based restricted stock (in dollars per share) | $ 0.85 | $ 0.75 | $ 0.63
Performance based restricted stock units | Executive Management |  |  |
Equity Compensation |  |  |
Award vesting period, in years | 3 years |  |
Restricted Shares, Granted | 13,000 | 14,000 | 12,000

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- Definition 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=96867065&loc=d3e5070-113901 + Details
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- Definition 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=96867065&loc=d3e5070-113901 + Details
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