Employee Benefit Plans (Benefits Expected to be Paid in Future Years) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 25, 2019	Dec. 26, 2018
Retirement Benefits [Abstract]
Employer contributions	$ 162	$ 195
Estimated employer contributions during 2020	700
Benefits expected to be paid:
2020	662
2021	223
2022	327
2023	418
2024	132
2025 through 2029	$ 640

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of benefits for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in third fiscal year following latest fiscal year.

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Amount of benefits for defined benefit plan expected to be paid in second fiscal year following latest fiscal year.

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