2.4.0.84040 - Disclosure - Property Dispositions and Assets Held for Sale (Details)truefalsefalse1false USDfalsefalse$D2013Q2http://www.sec.gov/CIK0001492869duration2013-04-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$2false USDfalsefalse$D2012Q2http://www.sec.gov/CIK0001492869duration2012-04-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$3false USDfalsefalse$D2013Q2YTDhttp://www.sec.gov/CIK0001492869duration2013-01-01T00:00:002013-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$4false USDfalsefalse$D2012Q2YTDhttp://www.sec.gov/CIK0001492869duration2012-01-01T00:00:002012-06-30T00:00:00USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$5false USDtruefalse$D2013Q2_M06_West34thStreet333Memberhttp://www.sec.gov/CIK0001492869duration2013-06-01T00:00:002013-06-30T00:00:00falsefalse333 West 34th Streetus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldislgop_West34thStreet333Memberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$6false USDtruefalse$D2013Q1_M03_MainStreet300Memberhttp://www.sec.gov/CIK0001492869duration2013-03-01T00:00:002013-03-31T00:00:00falsefalse300 Main Streetus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldislgop_MainStreet300Memberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$7false USDtruefalse$I2013Q2_MainStreet300Member_SAhttp://www.sec.gov/CIK0001492869instant2013-06-30T00:00:000001-01-01T00:00:00falsefalse300 Main Streetus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldislgop_MainStreet300Memberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$8false USDtruefalse$D2012Q1_M0229_PropertyAtMadisonAvenue292Memberhttp://www.sec.gov/CIK0001492869duration2012-02-28T00:00:002012-02-29T00:00:00falsefalseLeased fee interest at 292 Madison Avenueus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldislgop_PropertyAtMadisonAvenue292Memberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$9false USDtruefalse$D2013Q1_M0228_PropertyAt44West55thStreetMemberhttp://www.sec.gov/CIK0001492869duration2013-02-27T00:00:002013-02-28T00:00:00falsefalseProperty at 44 West 55th Streetus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisxbrldihttp://xbrl.org/2006/xbrldislgop_PropertyAt44West55thStreetMemberus-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Property Dispositions and Assets Held for Sale2false 4slgop_DiscontinuedOperationSaleConsiderationForDisposalOfDiscontinuedOperationsslgop_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse220300000220300000USD$falsetruefalse6truefalsefalse1350000013500000USD$falsetruefalse7falsefalsefalse00falsefalsefalse8truefalsefalse8500000085000000USD$falsetruefalse9truefalsefalse63000006300000USD$falsetruefalsexbrli:monetaryItemTypemonetaryRepresents the consideration for the sale of a portion of the entity's business, for example a segment, division, branch or other business, during the period.No definition available.false2Consideration for sale of property3false 4us-gaap_LongLivedAssetsHeldForSaleImpairmentChargeus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7truefalsefalse22000002200000falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe loss recognized for any initial write-down from carrying value to fair value less cost to sell for a classified as held for sale.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 33, 47 -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 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 false2Impairment charge for assets held for sale4false 4us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTaxus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse11130001113000falsefalsefalse4truefalsefalse66270006627000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8truefalsefalse66000006600000falsefalsefalse9truefalsefalse11000001100000falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 43 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph b -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. false2Gain (loss) on sale of property5true 5us-gaap_RevenuesAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Revenues6false 6slgop_DisposalGroupIncludingDiscontinuedOperationLeaseRevenueslgop_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse49300004930000falsefalsefalse2truefalsefalse38530003853000falsefalsefalse3truefalsefalse89600008960000falsefalsefalse4truefalsefalse84250008425000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of lease revenue attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Rental revenue7false 6slgop_DisposalGroupIncludingDiscontinuedOperationTenantReimbursementsslgop_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse155000155000falsefalsefalse2truefalsefalse618000618000falsefalsefalse3truefalsefalse609000609000falsefalsefalse4truefalsefalse11670001167000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of tenant reimbursements attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Escalation and reimbursement revenues8false 6slgop_DisposalGroupIncludingDiscontinuedOperationOtherIncomeslgop_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse70007000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of other income not otherwise specified in the taxonomy attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Other income9false 6us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse50850005085000falsefalsefalse2truefalsefalse44710004471000falsefalsefalse3truefalsefalse95760009576000falsefalsefalse4truefalsefalse95920009592000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -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 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 true2Total revenues10false 5us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpenseus-gaap_truedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse15420001542000falsefalsefalse2truefalsefalse14880001488000falsefalsefalse3truefalsefalse29830002983000falsefalsefalse4truefalsefalse28660002866000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of operating expenses attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 false2Operating expense11false 5slgop_DisposalGroupIncludingDiscontinuedOperationRealEstateTaxExpenseslgop_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse284000284000falsefalsefalse2truefalsefalse313000313000falsefalsefalse3truefalsefalse578000578000falsefalsefalse4truefalsefalse614000614000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of real estate tax attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Real estate taxes12false 5slgop_DisposalGroupIncludingDiscontinuedOperationInterestExpenseNetslgop_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse167000167000falsefalsefalse2truefalsefalse166000166000falsefalsefalse3truefalsefalse331000331000falsefalsefalse4truefalsefalse930000930000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of interest expense, net of interest income, allocated to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Interest expense, net of interest income13false 5slgop_DisposalGroupIncludingDiscontinuedOperationDepreciableRealEstateReservesslgop_falsecreditdurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse21500002150000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse21500002150000falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of depreciable real estate reserves attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Depreciable real estate reserves14false 5slgop_DisposalGroupIncludingDiscontinuedOperationTransactionRelatedCostsslgop_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse30003000falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse30003000falsefalsefalse4truefalsefalse9500095000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the transaction related costs during the period.No definition available.false2Transaction related costs15false 5slgop_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortizationslgop_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse16170001617000falsefalsefalse2truefalsefalse16050001605000falsefalsefalse3truefalsefalse32110003211000falsefalsefalse4truefalsefalse31560003156000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of depreciation and amortization expense attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.false2Depreciation and amortization16false 5slgop_DisposalGroupIncludingDiscontinuedOperationTotalCostsAndExpensesslgop_falsedebitdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse57630005763000falsefalsefalse2truefalsefalse35720003572000falsefalsefalse3truefalsefalse92560009256000falsefalsefalse4truefalsefalse76610007661000falsefalsefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the amount of cost related to real estate revenues and income (expense) from ancillary business-related activities attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.No definition available.true2Total expenses17false 5us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTaxus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalsetotalLabel1truefalsefalse-678000-678000USD$falsetruefalse2truefalsefalse899000899000USD$falsetruefalse3truefalsefalse320000320000USD$falsetruefalse4truefalsefalse19310001931000USD$falsetruefalse5falsefalsefalse00falsefalsefalse6falsefalsefalse00falsefalsefalse7falsefalsefalse00falsefalsefalse8falsefalsefalse00falsefalsefalse9falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAfter tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 43 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 true2Net (loss) income from discontinued operationsfalseProperty Dispositions and Assets Held for Sale (Details) (USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.slgreenoperatingpartnership.com/role/DisclosurePropertyDispositionsAndAssetsHeldForSaleDetails917