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benefits.","units":{"USD":[{"start":"2011-04-01","end":"2012-03-31","val":-159000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"}]}},"DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1":{"label":"Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation","description":"Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate.","units":{"USD":[{"start":"2012-04-01","end":"2013-03-31","val":-145000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":-88000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":-64000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents":{"label":"Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components (Deprecated 2012-01-31)","description":"The effect of a one-percentage- point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.","units":{"USD":[{"start":"2011-04-01","end":"2012-03-31","val":-6000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"}]}},"DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1":{"label":"Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components","description":"Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend 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rate.","units":{"USD":[{"start":"2011-04-01","end":"2012-03-31","val":167000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"},{"start":"2012-04-01","end":"2013-03-31","val":152000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":90000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":68000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents":{"label":"Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components","description":"Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate.","units":{"USD":[{"start":"2011-04-01","end":"2012-03-31","val":7000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"},{"start":"2012-04-01","end":"2013-03-31","val":6000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":3000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":2000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation":{"label":"Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation (Deprecated 2017-01-31)","description":"For pension plans, the amount of Increase or Decrease in the accumulated benefit obligation related to the effects of a settlement or curtailment.","units":{"USD":[{"end":"2012-06-30","val":125000,"accn":"0000815065-12-000016","fy":2012,"fp":"Q1","form":"10-Q","filed":"2012-08-02","frame":"CY2012Q2I"},{"end":"2012-09-30","val":125000,"accn":"0000815065-12-000021","fy":2012,"fp":"Q2","form":"10-Q","filed":"2012-11-08","frame":"CY2012Q3I"},{"end":"2012-12-31","val":495000,"accn":"0000815065-13-000003","fy":2012,"fp":"Q3","form":"10-Q","filed":"2013-02-08","frame":"CY2012Q4I"}]}},"DefinedBenefitPlanEstimatedFutureEmployerContributionsInNextFiscalYear":{"label":"Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2013-01-31)","description":"The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.","units":{"USD":[{"end":"2012-03-31","val":2595000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter (Deprecated 2012-01-31)","description":"The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).","units":{"USD":[{"end":"2012-03-31","val":19461000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Year Five (Deprecated 2012-01-31)","description":"The amount of the benefits expected to be paid in Year 5.","units":{"USD":[{"end":"2012-03-31","val":4058000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Year Four (Deprecated 2012-01-31)","description":"The amount of the benefits expected to be paid in Year 4.","units":{"USD":[{"end":"2012-03-31","val":4132000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Year One (Deprecated 2012-01-31)","description":"The amount of the benefits expected to be paid in Year 1.","units":{"USD":[{"end":"2012-03-31","val":4345000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Year Three (Deprecated 2012-01-31)","description":"The amount of the benefits expected to be paid in Year 3.","units":{"USD":[{"end":"2012-03-31","val":4148000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo":{"label":"Defined Benefit Plan, Expected Future Benefit Payments in Year Two (Deprecated 2012-01-31)","description":"The amount of the benefits expected to be paid in Year 2.","units":{"USD":[{"end":"2012-03-31","val":4347000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"DefinedBenefitPlanFairValueOfPlanAssets":{"label":"Defined Benefit Plan, Plan Assets, Amount","description":"Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.","units":{"USD":[{"end":"2011-03-31","val":42023000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011Q1I"},{"end":"2012-03-31","val":42391000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30"},{"end":"2012-03-31","val":42391000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2012Q1I"},{"end":"2013-03-31","val":46543000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30"},{"end":"2013-03-31","val":46543000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2013Q1I"},{"end":"2014-03-31","val":48613000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"end":"2014-03-31","val":48613000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014Q1I"},{"end":"2015-03-31","val":50426000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"DefinedBenefitPlanGrossPrescriptionDrugSubsidyReceiptsReceived":{"label":"Defined Benefit Plan, Gross Prescription Drug Subsidy Receipts Received (Deprecated 2017-01-31)","description":"Amount of the period's gross receipts received from the prescription drug subsidy, which is to be used in the roll forward of the accumulated postretirement benefit obligation of an applicable postretirement benefit plan.","units":{"USD":[{"start":"2010-04-01","end":"2011-03-31","val":768000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2010"},{"start":"2011-04-01","end":"2012-03-31","val":420000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30"},{"start":"2011-04-01","end":"2012-03-31","val":420000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2011"},{"start":"2012-04-01","end":"2013-03-31","val":400000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30"},{"start":"2012-04-01","end":"2013-03-31","val":400000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":316000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"start":"2013-04-01","end":"2014-03-31","val":316000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":457000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear":{"label":"Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year (Deprecated 2017-01-31)","description":"The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.","units":{"pure":[{"start":"2011-04-01","end":"2012-03-31","val":0.08,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2011"},{"start":"2012-04-01","end":"2013-03-31","val":0.08,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"start":"2012-04-01","end":"2013-03-31","val":0.08,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":0.07,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"start":"2013-04-01","end":"2014-03-31","val":0.07,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":0.07,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets":{"label":"Defined Benefit Plan, Plan with Benefit Obligation in Excess of Plan Assets, Fair Value of Plan Assets (Deprecated 2018-01-31)","description":"Fair value of plan assets for defined benefit plan with benefit obligation in excess of plan assets.","units":{"USD":[{"end":"2011-03-31","val":50331000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011Q1I"},{"end":"2012-03-31","val":46541000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2012Q1I"},{"end":"2012-03-31","val":46541000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30"},{"end":"2013-03-31","val":46543000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"}]}},"DefinedBenefitPlanUltimateHealthCareCostTrendRate":{"label":"Defined Benefit Plan, Ultimate Health Care Cost Trend Rate (Deprecated 2017-01-31)","description":"The ultimate trend rate for health care costs.","units":{"pure":[{"start":"2009-04-01","end":"2010-03-31","val":0.05,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2009"},{"start":"2010-04-01","end":"2011-03-31","val":0.05,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30"},{"start":"2010-04-01","end":"2011-03-31","val":0.05,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2010"},{"start":"2011-04-01","end":"2012-03-31","val":0.045,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30"},{"start":"2011-04-01","end":"2012-03-31","val":0.045,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30"},{"start":"2011-04-01","end":"2012-03-31","val":0.045,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2011"},{"start":"2012-04-01","end":"2013-03-31","val":0.045,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30"},{"start":"2012-04-01","end":"2013-03-31","val":0.045,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"start":"2012-04-01","end":"2013-03-31","val":0.045,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2012"},{"start":"2013-04-01","end":"2014-03-31","val":0.045,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29"},{"start":"2013-04-01","end":"2014-03-31","val":0.045,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2013"},{"start":"2014-04-01","end":"2015-03-31","val":0.045,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"}]}},"Depreciation":{"label":"Depreciation","description":"The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related 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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-03-31","val":15969000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":18322000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"}]}},"FiniteLivedIntangibleAssetsAmortizationExpenseYearFour":{"label":"Finite-Lived Intangible Asset, Expected Amortization, Year Four","description":"Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-03-31","val":16952000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":18410000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":24495000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"FiniteLivedIntangibleAssetsAmortizationExpenseYearThree":{"label":"Finite-Lived Intangible Asset, Expected Amortization, Year Three","description":"Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-03-31","val":17027000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":19005000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":24580000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo":{"label":"Finite-Lived Intangible Asset, Expected Amortization, Year Two","description":"Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. 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A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.","units":{"years":[{"start":"2010-04-01","end":"2011-03-31","val":20,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2010"}]}},"FiniteLivedIntangibleAssetsUsefulLifeMinimum":{"label":"Finite-Lived Intangible Assets, Useful Life, Minimum (Deprecated 2012-01-31)","description":"The minimum useful life of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company.","units":{"years":[{"start":"2011-04-01","end":"2012-03-31","val":5,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"}]}},"FutureAmortizationExpenseAfterYearFive":{"label":"Future Amortization Expense, after Year Five (Deprecated 2012-01-31)","description":"The amount of amortization expense expected to be recognized for the remainder of the finite-lived intangible asset useful life after the fifth succeeding fiscal year.","units":{"USD":[{"start":"2011-04-01","end":"2012-03-31","val":2165000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2011"}]}},"FutureAmortizationExpenseYearFive":{"label":"Future Amortization Expense, Year Five (Deprecated 2012-01-31)","description":"The amount of amortization expense expected 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"start":"2014-04-01","end":"2014-06-30","val":-233000,"accn":"0000815065-14-000008","fy":2015,"fp":"Q1","form":"10-Q","filed":"2014-08-08"},{"start":"2014-04-01","end":"2014-06-30","val":-233000,"accn":"0000815065-15-000008","fy":2016,"fp":"Q1","form":"10-Q","filed":"2015-08-07","frame":"CY2014Q2"},{"start":"2014-04-01","end":"2014-09-30","val":373000,"accn":"0000815065-14-000012","fy":2015,"fp":"Q2","form":"10-Q","filed":"2014-11-04"},{"start":"2014-04-01","end":"2014-09-30","val":373000,"accn":"0000815065-15-000009","fy":2016,"fp":"Q2","form":"10-Q","filed":"2015-10-30"},{"start":"2014-04-01","end":"2014-12-31","val":400000,"accn":"0001628280-15-000532","fy":2015,"fp":"Q3","form":"10-Q","filed":"2015-02-09"},{"start":"2014-04-01","end":"2015-03-31","val":151000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2014"},{"start":"2015-04-01","end":"2015-06-30","val":-3000,"accn":"0000815065-15-000008","fy":2016,"fp":"Q1","form":"10-Q","filed":"2015-08-07","frame":"CY2015Q2"},{"start":"2015-04-01","end":"2015-09-30","val":-103000,"accn":"0000815065-15-000009","fy":2016,"fp":"Q2","form":"10-Q","filed":"2015-10-30"}]}},"GainsLossesOnSalesOfAssets":{"label":"Gain 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Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2013-03-31","val":402290000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":320000000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":518250000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInNextRollingTwelveMonths":{"label":"Long-term Debt, Maturities, Repayments of Principal in Next Rolling Twelve Months","description":"Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2014-03-31","val":12980000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":20000000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive":{"label":"Long-Term Debt, Maturity, Year Five","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-03-31","val":120000000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour":{"label":"Long-Term Debt, Maturity, Year Four","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-03-31","val":20000000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"},{"end":"2013-03-31","val":0,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":140500000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":85000000,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree":{"label":"Long-Term Debt, Maturity, Year Three","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-03-31","val":0,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"},{"end":"2013-03-31","val":20000000,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":0,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":0,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo":{"label":"Long-Term Debt, Maturity, Year Two","description":"Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).","units":{"USD":[{"end":"2012-03-31","val":70000000,"accn":"0000815065-12-000009","fy":2011,"fp":"FY","form":"10-K/A","filed":"2012-05-30","frame":"CY2012Q1I"},{"end":"2013-03-31","val":0,"accn":"0000815065-13-000006","fy":2012,"fp":"FY","form":"10-K","filed":"2013-05-30","frame":"CY2013Q1I"},{"end":"2014-03-31","val":20000000,"accn":"0000815065-14-000004","fy":2013,"fp":"FY","form":"10-K","filed":"2014-05-29","frame":"CY2014Q1I"},{"end":"2015-03-31","val":0,"accn":"0000815065-15-000004","fy":2015,"fp":"FY","form":"10-K","filed":"2015-05-27","frame":"CY2015Q1I"}]}},"LongTermDebtNoncurrent":{"label":"Long-term Debt, Excluding Current Maturities","description":"Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. 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Amount excludes temporary equity. Alternate caption for the concept is permanent 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