2.4.0.840402 - Disclosure - Related Party Transactions (Affiliates Earned Commissions and Billed for Reimbursements Pursuant to Operating Agreement (Details)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalse$Duration_4_1_2013_To_6_30_2013http://www.sec.gov/CIK0000927569duration2013-04-01T00:00:002013-06-30T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$Duration_4_1_2012_To_6_30_2012http://www.sec.gov/CIK0000927569duration2012-04-01T00:00:002012-06-30T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$Duration_1_1_2013_To_6_30_2013http://www.sec.gov/CIK0000927569duration2013-01-01T00:00:002013-06-30T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$Duration_1_1_2012_To_6_30_2012http://www.sec.gov/CIK0000927569duration2012-01-01T00:00:002012-06-30T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 1us-gaap_RelatedPartyTransactionsAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Related Party Transactions [Abstract]2false 2xxaay_CostsReimbursedToGeneralPartnerManagerOrAffiliatesxxaay_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse6500065USD$falsetruefalse2truefalsefalse5700057USD$falsetruefalse3truefalsefalse146000146USD$falsetruefalse4truefalsefalse117000117USD$falsetruefalsexbrli:monetaryItemTypemonetaryThe reimbursement of costs incurred by the General Partner, Manager or Affiliates on behalf of the Fund. Such costs may be direct or indirect, and are repaid to the respective party.No definition available.false2Cost reimbursements to General Partner and/or affiliates3false 2xxaay_AssetManagementCostsToManagerGeneralPartnerxxaay_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse1600016falsefalsefalse2truefalsefalse1700017falsefalsefalse3truefalsefalse3100031falsefalsefalse4truefalsefalse3300033falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate costs related to asset management fees earned by the Manager/General Partner during the reporting period.No definition available.false2Equipment and incentive management fees to General Partner4false 2us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedPartyus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse8100081USD$falsetruefalse2truefalsefalse7400074USD$falsetruefalse3truefalsefalse177000177USD$falsetruefalse4truefalsefalse150000150USD$falsetruefalsexbrli:monetaryItemTypemonetaryExpenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 57 -Paragraph 2 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 true2Related Party Transaction, Expenses from Transactions with Related Party, TotalfalseRelated Party Transactions (Affiliates Earned Commissions and Billed for Reimbursements Pursuant to Operating Agreement (Details) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.atel.com/role/DisclosureRelatedPartyTransactionsAffiliatesEarnedCommissionsAndBilledForReimbursementsPursuantToOperatingAgreementDetails44