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Employee Retirement Plans (Schedule of Defined Benefit Plan, Amounts Recognized in Consolidated Financial Statements) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]      
Accrued pension liability: Current portion $ (395)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities $ (415)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities $ (402)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities
Accrued pension liability: Long term portion (1,566)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent (1,764)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent (2,076)us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent
Pre-tax accumulated other comprehensive income – retirement benefit liability adjustment 155us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax 149us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax 77us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax
Net amount recognized $ (2,116)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet $ (2,328)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet $ (2,555)us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet