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Benefit Plans and Collective Bargaining Agreements (Narrative) (Details) (USD $)
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12 Months Ended | |||
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Jan. 03, 2015
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Dec. 28, 2013
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Dec. 29, 2012
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Jun. 27, 2014
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| Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] | ||||
| Maximum annual employee contribution (percent) | 100.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent | |||
| Maximum annual employee contribution | $ 17,500us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount | |||
| 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 | 5,500synl_DefinedContributionPlanAdditionalAnnualContributionPerEmployeeAmountUnderEconomicGrowthAndTaxReliefReconciliationAct | |||
| Maximum contribution under the Economic Growth and Tax Relief Reconciliation Act | 23,000synl_DefinedContributionPlanMaximumAnnualContributionPerEmployeeAmountUnderEconomicGrowthAndTaxReliefReconciliationAct | |||
| Employer matching contribution (percent) | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent | 4.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent | |
| 401(k) employer contributions | 521,000us-gaap_DefinedContributionPlanCostRecognized | 550,000us-gaap_DefinedContributionPlanCostRecognized | 390,000us-gaap_DefinedContributionPlanCostRecognized | |
| Employer discretionary 401(k) contribution amount | 0us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 0us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | 0us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | |
| Employer contributions to union-sponsored defined contribution retirement plans | 2,329,000synl_MultiemployerPlansCollectiveBargainingArrangementAmountOfEmployersContributions | 882,000synl_MultiemployerPlansCollectiveBargainingArrangementAmountOfEmployersContributions | 739,000synl_MultiemployerPlansCollectiveBargainingArrangementAmountOfEmployersContributions | |
| Bristol, Tennessee and Mineral Ridge, Ohio Facilities [Member] | ||||
| Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] | ||||
| Number of collective bargaining agreements (agreements) |
3synl_NumberOfCollectiveBargainingAgreements / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| Number of company's employees represented by collective bargaining agreement (employees) |
162synl_MultiemployerPlansCollectiveBargainingArrangementNumberOfEmployersParticipants / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| Percentage of company's employees represented by collective bargaining agreement (percent) |
35.00%us-gaap_MultiemployerPlansCollectiveBargainingArrangementPercentageOfEmployersParticipants / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| United Steelworkers [Member] | Bristol, Tennessee and Mineral Ridge, Ohio Facilities [Member] | ||||
| Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] | ||||
| Number of individuals representing a collective bargaining agreement (individual) |
2synl_NumberOfIndividualsRepresentingCollectiveBargainingAgreement / us-gaap_CollectiveBargainingArrangementAxis = synl_UnitedSteelworkersMember / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| Teamsters [Member] | Bristol, Tennessee and Mineral Ridge, Ohio Facilities [Member] | ||||
| Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] | ||||
| Number of individuals representing a collective bargaining agreement (individual) |
1synl_NumberOfIndividualsRepresentingCollectiveBargainingAgreement / us-gaap_CollectiveBargainingArrangementAxis = synl_TeamstersMember / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| Number of employees represented by union |
2synl_NumberOfEmployeesRepresentedByUnion / us-gaap_CollectiveBargainingArrangementAxis = synl_TeamstersMember / us-gaap_StatementGeographicalAxis = synl_BristolTennesseeAndMineralRidgeOhioFacilitiesMember |
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| Bristol Fab [Member] | ||||
| Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract] | ||||
| Pension withdrawal liability from closure of Bristol Fab |
$ 1,900,000us-gaap_MultiemployerPlansWithdrawalObligation / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = synl_BristolFabMember |
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- Definition
Defined Contribution Plan, Additional Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act No definition available.
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- Definition
Defined Contribution Plan, Additional Annual Contribution Per Employee, Minimum Age Under Economic Growth and Tax Relief Reconciliation Act No definition available.
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- Definition
Defined Contribution Plan, Maximum Annual Contribution Per Employee, Amount Under Economic Growth and Tax Relief Reconciliation Act No definition available.
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- Definition
Multiemployer Plans, Collective-Bargaining Arrangement, Amount of Employer's Contributions No definition available.
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Multiemployer Plans, Collective-Bargaining Arrangement, Number of Employer's Participants No definition available.
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Number of Collective Bargaining Agreements No definition available.
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Number Of Employees Represented By Union No definition available.
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Number of Individuals Representing a Collective Bargaining Agreement No definition available.
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- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of discretionary contributions made by an employer to a defined contribution plan. No definition available.
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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. No definition available.
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- Definition
Maximum amount the employee may contribute to a defined contribution plan. No definition available.
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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. No definition available.
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the obligation recognized by withdrawing from 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. No definition available.
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