Postretirement Benefits Schedule of Net Funded Status and APBO (Details) (USD $)	12 Months Ended
Dec. 28, 2014 Rate	Dec. 29, 2013 Rate	Dec. 30, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Benefit obligation at beginning of year	$ 2,370,000	$ 2,622,000
Service cost	85,000us-gaap_DefinedBenefitPlanServiceCost	89,000us-gaap_DefinedBenefitPlanServiceCost	60,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost	92,000us-gaap_DefinedBenefitPlanInterestCost	91,000us-gaap_DefinedBenefitPlanInterestCost	106,000us-gaap_DefinedBenefitPlanInterestCost
Plan participants' contributions	89,000	77,000
Actuarial loss (gain)	808,000	(285,000)
Benefits paid	(342,000)us-gaap_DefinedBenefitPlanBenefitsPaid	(249,000)us-gaap_DefinedBenefitPlanBenefitsPaid
Medicare part D prescription drug subsidy	19,000	25,000
Benefit obligation at end of year	3,121,000	2,370,000	2,622,000
Employer contributions	234,000	147,000
Fair value of plan assets at beginning of year	0	0
Fair value of plan assets at end of year	0	0	0
Funded status	$ (3,121,000)	$ (2,370,000)
Discount rate used to determine benefit obligations	3.83%	4.48%
Discount rate used to determine net periodic benefit cost	4.48%	3.64%

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Gain or Loss

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The interest rate used to adjust for the time value of money for the plan.

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The interest rate used to adjust for the time value of money.

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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Amount of the period's gross receipts received from the prescription drug subsidy, which is to be used in the roll forward of the accumulated postretirement benefit obligation of an applicable postretirement benefit plan.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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