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Note 16 - Accumulated Other Comprehensive Loss (Details) - Accumulated Other Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
Apr. 05, 2015
Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Foreign currency translation adjustments $ (7,923)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax $ (7,265)us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax
Accumulated other comprehensive loss (25,693)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (25,035)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
UNITED STATES    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Employee benefit related adjustments (17,584)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_StatementGeographicalAxis
= country_US
(17,584)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_StatementGeographicalAxis
= country_US
MEXICO    
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Employee benefit related adjustments $ (186)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_StatementGeographicalAxis
= country_MX
$ (186)us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
/ us-gaap_StatementGeographicalAxis
= country_MX