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financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.falsefalseDefined Benefit Plan Disclosure [Line Items]3false0us-gaap_DefinedBenefitPlanBenefitObligationus-gaaptruecreditinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-118459000-118459falsetruefalsetruefalse4truefalsefalse-108118000-108118falsetruefalsetruefalse5truefalsefalse-98336000-98336falsetruefalsetruefalse6truefalsefalse-7724000-7724falsetruefalsetruefalse7truefalsefalse-7268000-7268falsetruefalsetruefalse8truefalsefalse-6348000-6348falsetruefalsetruefalse9truefalsefalse-29504000-29504falsetruefalsetruefalse10truefalsefalse-26517000-26517falsetruefalsetruefalse11truefalsefalse-23806000-23806falsetruefalsetruefalseMonetaryxbrli:monetaryItemTypemonetary1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. The projected benefit obligation is measured using assumptions as to future compensation levels if the pension benefit formula is based on those future compensation levels (pay-related, final-pay, final-average-pay, or career-average-pay plans). For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date. Prior to an employee's full eligibility date, the accumulated postretirement benefit obligation as of a particular date for an employee is the portion of the expected postretirement benefit obligation attributed to that employee's service rendered to that date; on and after the full eligibility date, the accumulated and expected postretirement benefit obligations for an employee are the same.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 6 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph E1 falsefalseProjected benefit obligation4false0us-gaap_DefinedBenefitPlanFairValueOfPlanAssetsus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsefalse108929000108929falsefalsefalsefalsefalse2truefalsefalse9667400096674falsefalsefalsefalsefalse3truefalsefalse9318700093187falsefalsefalsetruefalse4truefalsefalse8252300082523falsefalsefalsetruefalse5truefalsefalse5845600058456falsefalsefalsetruefalse6truefalsefalse38080003808falsefalsefalsetruefalse7truefalsefalse30840003084falsefalsefalsetruefalse8truefalsefalse20830002083falsefalsefalsetruefalse9truefalsefalse1193400011934falsefalsefalsetruefalse10truefalsefalse1106700011067falsefalsefalsetruefalse11truefalsefalse1006900010069falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryAssets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those nonbenefit obligations may be considered as reductions of plan assets.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 falsefalseFair value of defined benefit plan assets5false0us-gaap_DefinedBenefitPlanFundedStatusOfPlanus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalse2falsefalsefalse00falsefalsefalsefalsefalse3truefalsefalse-25272000-25272falsetruefalsetruefalse4truefalsefalse-25595000-25595falsetruefalsetruefalse5falsefalsefalse00falsefalsefalsetruefalse6truefalsefalse-3916000-3916falsetruefalsetruefalse7truefalsefalse-4184000-4184falsetruefalsetruefalse8falsefalsefalse00falsefalsefalsetruefalse9truefalsefalse-17570000-17570falsetruefalsetruefalse10truefalsefalse-15450000-15450falsetruefalsetruefalse11falsefalsefalse00falsefalsefalsetruefalseMonetaryxbrli:monetaryItemTypemonetaryThe funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph c falsefalseFunded status of defined benefit plan114Retirement Plans (Details 4) (USD $)ThousandsUnKnownUnKnownUnKnownfalsetrue