Employee Benefit Plans (Defined Contribution Plans) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 27, 2014 Rate	Dec. 28, 2013	Dec. 29, 2012
Non-Collective-Bargaining Plan [Member]
Defined Contribution Plans [Line Items]
Percentage of Employees Covered	86.00%
Employer Matching Contribution, Percentage	1.00%
Employer Matching Contribution, Discretionary Percentage	2.00%
Maximum Annual Contribution Per Employee, Percentage	3.00%
(Credit) Cost Recognized	$ 382	$ 610	$ 247
Collective-Bargaining Plan [Member]
Defined Contribution Plans [Line Items]
Percentage of Employees Covered	14.00%
Maximum Annual Contribution Per Employee, Percentage	2.75%
(Credit) Cost Recognized	$ 87	$ 86	$ 78

Defined Contribution Plan, Employees Covered, Percent

No definition available.

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- Definition

Defined Contribution Plan, Employer Matching Contribution, Discretionary, Percent

+ References

No definition available.

+ Details

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- 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=6414718&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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