Organization and Formation of Partnership	12 Months Ended
Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Formation of Partnership	1. Organization and Formation of Partnership First Industrial, L.P. (the "Operating Partnership") was organized as a limited partnership in the state of Delaware on November 23, 1993. The sole general partner is First Industrial Realty Trust, Inc. (the "Company") which owns common units in the Operating Partnership ("Units") representing an approximate 96.2% and 96.0% ownership interest at December 31, 2014 and 2013, respectively. The Company is a real estate investment trust ("REIT") as defined in the Internal Revenue Code of 1986 (the "Code"). The Company’s operations are conducted primarily through the Operating Partnership. The limited partners of the Operating Partnership owned, in the aggregate, approximately a 3.8% and 4.0% interest in the Operating Partnership at December 31, 2014 and 2013, respectively. Operations are also conducted through other partnerships and limited liability companies ("LLCs") of which the Operating Partnership is the sole member, and taxable REIT subsidiaries (together with the Operating Partnership, other partnerships and the LLCs, the "Consolidated Operating Partnership"), the operating data of which is consolidated with that of the Operating Partnership as presented herein. Unless the context otherwise requires, the terms "we," "us" and "our" refer to First Industrial, L.P. and its controlled subsidiaries. We also hold at least a 99% limited partnership interest in First Industrial Financing Partnership, L.P. (the "Financing Partnership"), First Industrial Securities, L.P. (the "Securities Partnership"), First Industrial Mortgage Partnership, L.P, (the "Mortgage Partnership"), First Industrial Pennsylvania, L.P. (the "Pennsylvania Partnership"), First Industrial Harrisburg, L.P. (the "Harrisburg Partnership"), First Industrial Indianapolis, L.P. (the "Indianapolis Partnership"), TK-SV, LTD. and FI Development Services, L.P. (together, the "Other Real Estate Partnerships"). The Other Real Estate Partnerships' operating data is presented herein on a combined basis, separate from that of the Consolidated Operating Partnership. We also provide various services to two joint ventures (the "2003 Net Lease Joint Venture" and the "2007 Europe Joint Venture"; collectively, the "Joint Ventures"). Our noncontrolling equity ownership interests in the 2003 Net Lease Joint Venture and 2007 Europe Joint Venture are 15% and 10%, respectively. At December 31, 2014, the 2003 Net Lease Joint Venture owned one industrial property comprising approximately 0.8 million square feet of gross leasable area ("GLA") and the 2007 Europe Joint Venture did not own any properties. The 2003 Net Lease Joint Venture is considered a variable interest entity in accordance with the FASB guidance on the consolidation of variable interest entities. We continue to conclude that we are not the primary beneficiary of this venture. Our maximum exposure to loss is equal to our investment. The general partners of the Other Real Estate Partnerships are separate corporations, each with at least a .01% general partnership interest in the Other Real Estate Partnership for which it acts as a general partner. Each general partner of the Other Real Estate Partnerships is a wholly-owned subsidiary of the Company. As of December 31, 2014, we owned 576 industrial properties located in 24 states, containing an aggregate of approximately 55.6 million square feet of GLA. On a combined basis, as of December 31, 2014, the Other Real Estate Partnerships owned 62 industrial properties containing an aggregate of approximately 7.9 million square feet of GLA. Profits, losses and distributions of us, the LLCs and Other Real Estate Partnerships are allocated to the general partner and the limited partners or the members, as applicable, in accordance with the provisions contained within the partnership agreements, operating agreements or other ownership agreements, as applicable. The Other Real Estate Partnerships and the Joint Ventures are accounted for under the equity method of accounting. Accordingly, the operating data of the Other Real Estate Partnerships and the Joint Ventures are not consolidated with that of the Consolidated Operating Partnership as presented herein. Any references to the number of buildings and square footage in the financial statement footnotes are unaudited.

1. Organization and Formation of Partnership

First Industrial, L.P. (the "Operating Partnership") was organized as a limited partnership in the state of Delaware on November 23, 1993. The sole general partner is First Industrial Realty Trust, Inc. (the "Company") which owns common units in the Operating Partnership ("Units") representing an approximate 96.2% and 96.0% ownership interest at December 31, 2014 and 2013, respectively. The Company is a real estate investment trust ("REIT") as defined in the Internal Revenue Code of 1986 (the "Code"). The Company’s operations are conducted primarily through the Operating Partnership. The limited partners of the Operating Partnership owned, in the aggregate, approximately a 3.8% and 4.0% interest in the Operating Partnership at December 31, 2014 and 2013, respectively. Operations are also conducted through other partnerships and limited liability companies ("LLCs") of which the Operating Partnership is the sole member, and taxable REIT subsidiaries (together with the Operating Partnership, other partnerships and the LLCs, the "Consolidated Operating Partnership"), the operating data of which is consolidated with that of the Operating Partnership as presented herein. Unless the context otherwise requires, the terms "we," "us" and "our" refer to First Industrial, L.P. and its controlled subsidiaries.

We also hold at least a 99% limited partnership interest in First Industrial Financing Partnership, L.P. (the "Financing Partnership"), First Industrial Securities, L.P. (the "Securities Partnership"), First Industrial Mortgage Partnership, L.P, (the "Mortgage Partnership"), First Industrial Pennsylvania, L.P. (the "Pennsylvania Partnership"), First Industrial Harrisburg, L.P. (the "Harrisburg Partnership"), First Industrial Indianapolis, L.P. (the "Indianapolis Partnership"), TK-SV, LTD. and FI Development Services, L.P. (together, the "Other Real Estate Partnerships"). The Other Real Estate Partnerships' operating data is presented herein on a combined basis, separate from that of the Consolidated Operating Partnership.

We also provide various services to two joint ventures (the "2003 Net Lease Joint Venture" and the "2007 Europe Joint Venture"; collectively, the "Joint Ventures"). Our noncontrolling equity ownership interests in the 2003 Net Lease Joint Venture and 2007 Europe Joint Venture are 15% and 10%, respectively. At December 31, 2014, the 2003 Net Lease Joint Venture owned one industrial property comprising approximately 0.8 million square feet of gross leasable area ("GLA") and the 2007 Europe Joint Venture did not own any properties. The 2003 Net Lease Joint Venture is considered a variable interest entity in accordance with the FASB guidance on the consolidation of variable interest entities. We continue to conclude that we are not the primary beneficiary of this venture. Our maximum exposure to loss is equal to our investment.

The general partners of the Other Real Estate Partnerships are separate corporations, each with at least a .01% general partnership interest in the Other Real Estate Partnership for which it acts as a general partner. Each general partner of the Other Real Estate Partnerships is a wholly-owned subsidiary of the Company.

As of December 31, 2014, we owned 576 industrial properties located in 24 states, containing an aggregate of approximately 55.6 million square feet of GLA. On a combined basis, as of December 31, 2014, the Other Real Estate Partnerships owned 62 industrial properties containing an aggregate of approximately 7.9 million square feet of GLA.

Profits, losses and distributions of us, the LLCs and Other Real Estate Partnerships are allocated to the general partner and the limited partners or the members, as applicable, in accordance with the provisions contained within the partnership agreements, operating agreements or other ownership agreements, as applicable.

The Other Real Estate Partnerships and the Joint Ventures are accounted for under the equity method of accounting. Accordingly, the operating data of the Other Real Estate Partnerships and the Joint Ventures are not consolidated with that of the Consolidated Operating Partnership as presented herein.

Any references to the number of buildings and square footage in the financial statement footnotes are unaudited.