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Commitments and Contingencies - Additional Information (Details) (USD $)
Mar. 31, 2015
property
Dec. 31, 2014
property
Sep. 16, 2014
property
Jun. 30, 2014
Jul. 31, 2014
property
Jul. 01, 2014
property
Commitments and Contingencies [Line Items]            
Letters of Credit Outstanding, Amount $ 11,000,000us-gaap_LettersOfCreditOutstandingAmount          
Letters of Credit Outstanding, Amount Advanced 0krg_LettersofCreditOutstandingAmountAdvanced          
Number of Real Estate Properties 117us-gaap_NumberOfRealEstateProperties 61us-gaap_NumberOfRealEstateProperties 15us-gaap_NumberOfRealEstateProperties      
Business Combination, Contingent Consideration, Liability 8,890,000us-gaap_BusinessCombinationContingentConsiderationLiability     9,664,000us-gaap_BusinessCombinationContingentConsiderationLiability    
Inland Diversified Real Estate Trust [Member]            
Commitments and Contingencies [Line Items]            
Number of Real Estate Properties         60us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= krg_InlandDiversifiedRealEstateTrustMember
60us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= krg_InlandDiversifiedRealEstateTrustMember
Earnout [Member] | Inland Diversified Real Estate Trust [Member]            
Commitments and Contingencies [Line Items]            
Number of Real Estate Properties 6us-gaap_NumberOfRealEstateProperties
/ us-gaap_BusinessAcquisitionAxis
= krg_InlandDiversifiedRealEstateTrustMember
/ us-gaap_ContingentConsiderationByTypeAxis
= krg_EarnoutMember
         
Business Combination, Contingent Consideration, Liability $ 8,900,000us-gaap_BusinessCombinationContingentConsiderationLiability
/ us-gaap_BusinessAcquisitionAxis
= krg_InlandDiversifiedRealEstateTrustMember
/ us-gaap_ContingentConsiderationByTypeAxis
= krg_EarnoutMember