Organization	9 Months Ended
Sep. 30, 2011
Organization [Abstract]
Organization	Organization Piedmont Office Realty Trust, Inc. (“Piedmont”) is a Maryland corporation that operates in a manner so as to qualify as a real estate investment trust (“REIT”) for federal income tax purposes and engages in the acquisition and ownership of commercial real estate properties throughout the United States, including properties that are under construction, are newly constructed, or have operating histories. Piedmont was incorporated in 1997 and commenced operations on June 5, 1998. Piedmont conducts business primarily through Piedmont Operating Partnership, L.P. (“Piedmont OP”), a Delaware limited partnership, as well as performing the management of its buildings through two wholly-owned subsidiaries, Piedmont Government Services, LLC and Piedmont Office Management, LLC. Piedmont is the sole general partner of Piedmont OP and possesses full legal control and authority over the operations of Piedmont OP. Piedmont OP owns properties directly, through wholly-owned subsidiaries, and through both consolidated and unconsolidated joint ventures. References to Piedmont herein shall include Piedmont and all of its subsidiaries, including Piedmont OP and its subsidiaries and joint ventures. As of September 30, 2011, Piedmont owned interests in 79 office properties, plus five buildings owned through unconsolidated joint ventures and two industrial buildings. Our 79 office properties are located in 18 metropolitan areas across the United States. These office properties comprise approximately 21.8 million square feet of primarily Class A commercial office space, and were approximately 86.4% leased as of September 30, 2011.

Organization

9 Months Ended

Sep. 30, 2011

Piedmont Office Realty Trust, Inc. (“Piedmont”) is a Maryland corporation that operates in a manner so as to qualify as a real estate investment trust (“REIT”) for federal income tax purposes and engages in the acquisition and ownership of commercial real estate properties throughout the United States, including properties that are under construction, are newly constructed, or have operating histories. Piedmont was incorporated in 1997 and commenced operations on June 5, 1998. Piedmont conducts business primarily through Piedmont Operating Partnership, L.P. (“Piedmont OP”), a Delaware limited partnership, as well as performing the management of its buildings through two wholly-owned subsidiaries, Piedmont Government Services, LLC and Piedmont Office Management, LLC. Piedmont is the sole general partner of Piedmont OP and possesses full legal control and authority over the operations of Piedmont OP. Piedmont OP owns properties directly, through wholly-owned subsidiaries, and through both consolidated and unconsolidated joint ventures. References to Piedmont herein shall include Piedmont and all of its subsidiaries, including Piedmont OP and its subsidiaries and joint ventures.

As of September 30, 2011, Piedmont owned interests in 79 office properties, plus five buildings owned through unconsolidated joint ventures and two industrial buildings. Our 79 office properties are located in 18 metropolitan areas across the United States. These office properties comprise approximately 21.8 million square feet of primarily Class A commercial office space, and were approximately 86.4% leased as of September 30, 2011.