Employee Benefit Plans (Defined Contribution Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Non-Collective-Bargaining Plan [Member]
Defined Contribution Plans [Line Items]
Percentage of Employees Covered	87.00%
Employer Matching Contribution, Percentage	1.00%
Employer Matching Contribution, Discretionary Percentage	2.00%
Maximum Annual Contribution Per Employee, Percentage	3.00%
Cost Recognized	$ 425	$ 454	$ 382
Collective-Bargaining Plan [Member]
Defined Contribution Plans [Line Items]
Percentage of Employees Covered	13.00%
Maximum Annual Contribution Per Employee, Percentage	2.75%
Cost Recognized	$ 71	$ 82	$ 87

Defined Contribution Plan, Employees Covered, Percent

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- Definition

Defined Contribution Plan, Employer Matching Contribution, Discretionary, Percent

+ References

No definition available.

+ Details

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- Definition

Defined Contribution Plans [Line Items]

+ References

No definition available.

+ Details

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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

+ Details

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

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- Details

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- Details

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