2.4.0.8162 - Disclosure - Commitments and Contingencies (Details Textual)truefalsefalse1false falsefalseP06_01_2013To06_30_2013http://www.sec.gov/CIK0001287701duration2013-06-01T00:00:002013-06-30T00:00:002false falsefalseP01_01_2013To06_30_2013http://www.sec.gov/CIK0001287701duration2013-01-01T00:00:002013-06-30T00:00:001false 4us-gaap_DescriptionOfLesseeLeasingArrangementsOperatingLeasesus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00The lease is for approximately 6,580 square feet and carries a term of 10 years with rents of approximately $373 per annum for year one rising to $463 per annum in year ten.falsefalsefalse2falsefalsefalse00The Company's regional management office located at 610 Old York Road, Jenkintown, Pennsylvania, is subject to an operating lease with an affiliate of KBS Real Estate Investment Trust, Inc., or KBS. The lease is for approximately 17,000 square feet, and expires on May 31, 2014, with rents of approximately $322 per annum. The Company's regional management office located at 800 Market Street, St. Louis, Missouri is subject to an operating lease with St. Louis BOA Plaza, LLC. The lease is for approximately 2,000 square feet, expires on September 30, 2013, and is cancelable with 90 days' notice. The lease is subject to rents of $32 per annum.falsefalsefalsexbrli:stringItemTypestringA general description of the nature of the existing leasing arrangements of a lessee for all operating leases including, but not limited to: (1) rental escalation clauses; (2) renewal or purchase options; (3) guarantees or indemnities, if any, (4) restrictions imposed by lease arrangements; (5) unusual provisions or conditions; (6) contingent rentals, if any; and (7) lease expiration dates.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6452660&loc=d3e36991-112694 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 1) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 false0Description of Lessee Leasing Arrangements, Operating Leases2false 4gkk_DescriptionOfLesseeLeasingArrangementsOperatingLeasesAmendmentgkk_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseverboseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00The lease is for approximately 7,300 square feet and carries a term of 10 years with rents of approximately $249 per annum for year one rising to $315 per annum in year ten. In May and June 2009, the Company amended its lease with SLG Graybar Sublease LLC to increase the leased premises by approximately 2,260 square feet. The additional premises are leased on a co-terminus basis with the remainder of the Company's leased premises and carries rents of approximately $103 per annum during the initial lease year and $123 per annum during the final lease year. On June 25, 2012, the lease was further amended to reduce the leased premises by approximately 600 square feet and to reduce rents by approximately $29 per annum during the initial year and $38 per annum during the final lease year. All other terms of the lease remain unchanged, except the Company now has the right to cancel the lease with 90 days notice.falsefalsefalsexbrli:stringItemTypestringA general description of amendment related to the nature of the existing leasing arrangements of a lessee for all operating leases including, but not limited to: (1) rental escalation clauses; (2) renewal or purchase options; (3) guarantees or indemnities, if any, (4) restrictions imposed by lease arrangements; (5) unusual provisions or conditions; (6) contingent rentals, if any; and (7) lease expiration dates.No definition available.false0Description Of Lessee Leasing Arrangements Operating Leases Amendment3false 4gkk_DiscriptionOfTenantLeasingArrangementsOfExpansiongkk_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00The Company is obligated under certain tenant leases, to construct the underlying leased property or fund tenant expansions. As of June 30, 2013, the Company had four outstanding commitments: (1) The construction of a 120,000 square foot cold storage facility located in Hialeah Gardens, Florida, of which the unfunded amounts were estimated to be $23,158; (2) The contribution of $1,500 towards tenant improvements on a warehouse/industrial property in Garland, Texas; (3) The expansion of a property located in Olive Branch, Mississippi whereby the tenant has a one-time option to expand the building by 250,000; and (4) The expansion of a property located in Logan Township, New Jersey whereby the tenant has a one-time option to expand the building by 25,000 square feet. The tenants have not noticed the Company for the building expansion options and as such, no amounts are due and no unfunded amounts have been estimated.falsefalsefalsexbrli:stringItemTypestringDescription of tenant Leasing Arrangements of expansion.No definition available.false0Discription Of Tenant Leasing Arrangements Of ExpansionfalseCommitments and Contingencies (Details Textual)UnKnownUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.gramercycapitalcorp.com/role/CommitmentsAndContingenciesDetailsTextual23