XML 116 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Organization and Basis of Presentation (Details) (SL Green Operating Partnership)
0 Months Ended
Dec. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Organization      
Percentage of ownership in SL Green Management LLC owned by operating partnership (percent) 100.00%us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest    
Noncontrolling interest in the operating partnership (as a percent) 3.92%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners 3.92%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners 2.96%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Service Corporation
     
Organization      
Economic interest in variable interest entity (as a percent) 95.00%us-gaap_VariableInterestEntityOwnershipPercentage
/ dei_LegalEntityAxis
= us-gaap_PartnershipInterestMember
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= us-gaap_VariableInterestEntityPrimaryBeneficiaryMember