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Benefit Plans and Collective Bargaining Agreements Defined Contribution Plans (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Jan. 03, 2015
401(k) Employee Stock Ownership Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined Contribution Plan, Cost Recognized | $ 517,000 | $ 541,000 | $ 521,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 100.00% |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0 | $ 0
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act | $ 24,000 |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay | 4.00% | 4.00% | 4.00%
Defined Contribution Plan, Additional Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act | $ 6,000 |  |
Defined Contribution Plan, Additional Annual Contribution Per Employee, Minimum Age Under Economic Growth and Tax Relief Reconciliation Act |  | 50 years |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount | 18,000 |  |
401(k) and Profit Sharing Plan [Member] |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Defined Contribution Plan, Cost Recognized | $ 137,000 | $ 147,000 | $ 148,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent | 60.00% |  |
Defined Contribution Plan, Employer Discretionary Contribution Amount | $ 0 | $ 0 | $ 0
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act | 24,000 |  |
Defined Contribution Plan, Additional Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act | $ 6,000 |  |
Defined Contribution Plan, Additional Annual Contribution Per Employee, Minimum Age Under Economic Growth and Tax Relief Reconciliation Act | 50 years |  |
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount | $ 18,000 |  |

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- Definition Defined Contribution Plan, Additional Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act + References No definition available. + Details
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- Definition Defined Contribution Plan, Additional Annual Contribution Per Employee, Minimum Age Under Economic Growth and Tax Relief Reconciliation Act + References No definition available. + Details
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- Definition Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act + 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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + 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 amount the employee may contribute 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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