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Benefit Plans and Collective Bargaining Agreements (Narrative) (Details) (USD $) | 12 Months Ended
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Dec. 29, 2012 | Dec. 31, 2011 | Jan. 01, 2011
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |
Maximum annual employee contribution (percent) | 100.00% |  |
Maximum annual employee contribution | $ 17,000 |  |
Minimum age for additional contribution under the Economic Growth and Tax Relief Reconciliation Act (years) | 50 years |  |
Additional maximum contribution under the Economic Growth and Tax Relief Reconciliation Act | 5,500 |  |
Maximum contribution under the Economic Growth and Tax Relief Reconciliation Act | 22,500 |  |
Employer matching contribution (percent) | 4.00% | 4.00% | 4.00%
401(k) employer contributions | 390,000 | 345,000 | 364,000
Employer discretionary 401(k) contribution amount | 0 | 0 | 0
Employer contributions to union-sponsored defined contribution retirement plans | $ 739,000 | $ 688,000 | $ 607,000
Bristol, Tennessee Facility [Member] |  |  |
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |
Number of collective bargaining agreements (agreements) | 3 |  |
Number of company's employees represented by collective bargaining agreement (employees) | 224 |  |
Percentage of company's employees represented by collective bargaining agreement (percent) | 38.00% |  |
AFL-CIO [Member] | Bristol, Tennessee Facility [Member] |  |  |
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |
Number of individuals representing a collective bargaining agreement (individual) | 2 |  |
Teamsters [Member] | Bristol, Tennessee Facility [Member] |  |  |
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] |  |  |
Number of individuals representing a collective bargaining agreement (individual) | 1 |  |

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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=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Percentage of employee participants subject to a collective bargaining arrangement to all of the employer's participants in a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=14450570&loc=SL14450657-114947 + Details
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