Note 4 - Real Estate Under Development - Costs Incurred for Real Estate Development (Details) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Property Under Development	[1]	$ 241,384	$ 402,518
Dania Pointe [Member]
Property Under Development	[2]	152,111	152,841
Mill Station [Member]
Property Under Development		55,771	34,347
Promenade at Christiana [Member]
Property Under Development	[3]	33,502	32,875
Grand Parkway Marketplace II [Member]
Property Under Development	[4]		43,403
Lincoln Square [Member]
Property Under Development	[5]		90,479
Avenues Walk [Member]
Property Under Development	[6]		$ 48,573

[1] Includes capitalized costs of interest, real estate taxes, insurance, legal costs and payroll of $24.9 million and $27.7 million, as of December 31, 2018 and 2017, respectively.

[2] During 2018, the Company acquired a parcel adjacent to this development project for a purchase price of $4.6 million. Effective December 31, 2018, certain phases of this development project, aggregating $129.7 million (including capitalized costs of $8.9 million), were placed in service and reclassified into Land and Building and improvements on the Company's Consolidated Balance Sheets. The remaining portion of the project consists of a mixed-use development project.

[3] Project to be developed in the future.

[4] During 2017, the Company sold a land parcel at this development project for a sales price of $2.9 million. In addition, effective September 30, 2018, this development project, aggregating $47.4 million (including capitalized costs of $5.2 million), was placed in service and reclassified into Land and Building and improvements on the Company's Consolidated Balance Sheets.

[5] During 2017, KIM Lincoln, LLC ("KIM Lincoln"), a wholly owned subsidiary of the Company, and Lincoln Square Property, LP ("Lincoln Member") entered into a joint venture agreement wherein KIM Lincoln has a 90% controlling interest and Lincoln Member has a 10% noncontrolling interest. The joint venture acquired land parcels in Philadelphia, PA to be held for development for a gross purchase price of $10.0 million. Based upon the Company's intent to develop the property, the Company allocated the gross purchase price to Real estate under development on the Company's Consolidated Balance Sheets. This joint venture is accounted for as a consolidated VIE (see Footnote 9). Effective December 31, 2018, this development project, aggregating $161.5 million (including capitalized costs of $7.1 million), was placed in service and reclassified into Land and Building and improvements on the Company's Consolidated Balance Sheets.

[6] During 2018, the Company reclassified this project to Land on the Company's Consolidated Balance Sheets, as it is no longer anticipated to be developed and will be marketed for sale as-is. This as-is value, estimated fair value, was below the carrying value and as such, the Company recorded an impairment charge of $37.8 million during the year ended December 31, 2018.