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Employee Benefit Plans (Schedule of Amounts Recognized on the Balance Sheet) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Employee Benefit Plans [Abstract]    
Accrued benefit liability    $ 509us-gaap_DefinedBenefitPlanFundedStatusOfPlan
Accumulated other comprehensive loss, net of tax    19,379us-gaap_AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax
Deferred tax asset    10,905us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions
Nat amount recognized    $ 30,793us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax