1.0.0.3 true Statement Of Shareholders Equity And Other Comprehensive Income (Parenthetical) (USD $) In Thousands false 1 $ true false false false Accumulated other comprehensive loss us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ true false false false Energy, Inc. common stockholders' equity us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi aye_ParentMember us-gaap_StatementEquityComponentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 3 $ false false Shares Standard http://www.xbrl.org/2003/instance shares 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDperShareItemType Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 5 Defined benefit pension and other benefit plan amortization, tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 true true 621000 621 true false 2 true true 621000 621 true false 3 true true 621000 621 false false No definition available. No authoritative reference available. false 6 Cash flow hedges, tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 44171000 44171 true false 2 false true 44171000 44171 true false 3 false true 44171000 44171 false false No definition available. No authoritative reference available. false 7 Unrealized losses on available-for-sale securities, tax 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1000 1 true false 2 false true 1000 1 true false 3 false true 1000 1 false false No definition available. No authoritative reference available. false 5 Defined benefit pension and other benefit plan amortization, tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 287000 287 true false 2 false true 287000 287 true false 3 false true 287000 287 false false No definition available. No authoritative reference available. false 6 Cash flow hedges, tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 19785000 19785 true false 2 false true 19785000 19785 true false 3 false true 19785000 19785 false false No definition available. No authoritative reference available. false 7 Unrealized losses on available-for-sale securities, tax 3 us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1000 1 true false 2 false true 1000 1 true false 3 false true 1000 1 false false No definition available. No authoritative reference available. false 5 Defined benefit pension and other benefit plan amortization, tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1126000 1126 true false 2 false true 1126000 1126 true false 3 false true 1126000 1126 false false No definition available. No authoritative reference available. false 6 Cash flow hedges, tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 4868000 4868 true false 2 false true 4868000 4868 true false 3 false true 4868000 4868 false false No definition available. No authoritative reference available. false 5 Defined benefit pension and other benefit plan amortization, tax 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 555000 555 true false 2 false true 555000 555 true false 3 false true 555000 555 false false No definition available. No authoritative reference available. false 6 Cash flow hedges, tax 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 true true 8462000 8462 true false 2 true true 8462000 8462 true false 3 true true 8462000 8462 false false No definition available. No authoritative reference available. false false 3 10 false Thousands UnKnown UnKnown false true