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Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 false2Mortgages payable6false 4irc_FiniteLivedIntangibleAssetsAcquiredBelowMarketLeasesNetirc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-45087000-45087USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-45087000-45087USD$falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse-12976000-12976USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and is net of accumulated amortization and any impairment charges.No definition available.false2Below market lease intangibles7false 4us-gaap_OtherLiabilitiesus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse-20734000-20734USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse-20734000-20734USD$falsefalsefalse4falsefalsefalse00falsefalsefalse5truefalsefalse-33014000-33014USD$falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 false2Other liabilities8false 4us-gaap_GainLossOnSaleOfInterestInProjectsus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse393000393USD$falsefalsefalse2truefalsefalse1200012USD$falsefalsefalse3truefalsefalse734000734USD$falsefalsefalse4truefalsefalse6400064USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryGain (loss) included in earnings resulting from the sale of interest in projects.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 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. false2Gain on sale of joint venture interest9false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalse6false USDtruefalse$I2013Q2_us-gaap_RealEstatePropertiesAxis_us-gaap_UnconsolidatedPropertiesMember_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_irc_IrcirexVentureIiLlcMemberhttp://www.sec.gov/CIK0000923284instant2013-06-30T00:00:000001-01-01T00:00:00falsefalseUnconsolidated propertiesus-gaap_RealEstatePropertiesAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_UnconsolidatedPropertiesMemberus-gaap_RealEstatePropertiesAxisexplicitMemberfalsefalseIRCIREX Venture II LLCus-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxisxbrldihttp://xbrl.org/2006/xbrldiirc_IrcirexVentureIiLlcMemberus-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Unconsolidated properties | IRCIREX Venture II LLC10true 3us-gaap_RealEstatePropertiesLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Unconsolidated joint ventures11false 4us-gaap_RealEstateInvestmentPropertyNetus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse-58018000-58018USD$falsefalsefalse2truefalsefalse-10629000-10629USD$falsefalsefalse3truefalsefalse-58018000-58018USD$falsefalsefalse4truefalsefalse-10629000-10629USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 false2Net investment properties12false 4irc_RealEstateInvestmentAcquiredLeaseIntangiblesNetirc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1truefalsefalse-8236000-8236USD$falsefalsefalse2truefalsefalse-1762000-1762USD$falsefalsefalse3truefalsefalse-8236000-8236USD$falsefalsefalse4truefalsefalse-1762000-1762USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe net book value of acquired lease intangibles, net.No definition available.false2Acquired lease intangibles, net13false 4us-gaap_SecuredDebtus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse3998500039985USD$falsefalsefalse2truefalsefalse58500005850USD$falsefalsefalse3truefalsefalse3998500039985USD$falsefalsefalse4truefalsefalse58500005850USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 false2Mortgages payable14false 4irc_FiniteLivedIntangibleAssetsAcquiredBelowMarketLeasesNetirc_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truefalsefalse828000828USD$falsefalsefalse2truefalsefalse691000691USD$falsefalsefalse3truefalsefalse828000828USD$falsefalsefalse4truefalsefalse691000691USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThis element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. 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(2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(d)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 false2Net investment properties19false 4irc_RealEstateInvestmentAcquiredLeaseIntangiblesNetirc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-149000-149USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-149000-149USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe net book value of acquired lease intangibles, net.No definition available.false2Acquired lease intangibles, net20false 4irc_DeferredFinancingAndLeasingCostsNetirc_falsedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-1120000-1120USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-1120000-1120USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRepresents the net carrying amount of deferred financing costs and deferred leasing costs for an entity that discloses an unclassified balance sheet.No definition available.false2Deferred costs, net21false 4us-gaap_OtherAssetsus-gaap_truedebitinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse-1675000-1675USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse-1675000-1675USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryThe aggregate carrying amounts, as of the balance sheet date, of assets not separately disclosed in the balance sheet.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 7 false2Other assets22false 4us-gaap_SecuredDebtus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1falsefalsefalse00falsefalsefalse2truefalsefalse2089100020891USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse2089100020891USD$falsefalsefalse5falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryCarrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). 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