Mortgage Notes Payable	9 Months Ended
Sep. 30, 2012
Mortgage Notes Payable	5. Mortgage Notes Payable On January 31, 2012, the servicer of the non-recourse mortgage loan collateralized by the Company’s Montvale Center property located in Gaithersburg, Maryland foreclosed on the property. During 2011, the Company had notified the master servicer of the non-recourse mortgage loan that the cash flows generated from the property were insufficient to fund debt service payments and capital improvements necessary to lease and operate the property and that the Company was not prepared to fund any cash shortfalls. The Company was not current on making debt service payments and was accruing interest at the default interest rate of 9.93% per annum. The loan was originally scheduled to mature on June 6, 2012. As a result of the foreclosure, the mortgage loan totaling $25.0 million was extinguished and the related obligations were satisfied with the transfer of the real estate and working capital to the servicer. The Company no longer has any equitable or economic ownership interest in the property. The transaction resulted in a gain on forgiveness of debt of approximately $17.8 million. The operating results of the property through the date of foreclosure have been classified as discontinued operations on a historical basis for all periods presented (See Note 3). On March 12, 2012, the Company used available cash to repay the mortgage loan collateralized by its Bay Colony Corporate Center property located in Waltham, Massachusetts totaling $143.9 million. The mortgage financing bore interest at a fixed rate of 6.53% per annum and was scheduled to mature on June 11, 2012. There was no prepayment penalty. The Company recognized a gain on early extinguishment of debt totaling approximately $0.9 million related to the acceleration of the remaining balance of the historical fair value adjustment, which was the result of purchase accounting. On April 2, 2012, the Company used available cash to repay the mortgage loan collateralized by its One Freedom Square property located in Reston, Virginia totaling $65.1 million. The mortgage financing bore interest at a fixed rate of 7.75% per annum and was scheduled to mature on June 30, 2012. There was no prepayment penalty. The Company recognized a gain on early extinguishment of debt totaling approximately $0.3 million related to the acceleration of the remaining balance of the historical fair value debt adjustment, which was the result of purchase accounting. On August 29, 2012, in connection with the Company’s acquisition of the development project located at 680 Folsom Street in San Francisco, California, the Company assumed the construction loan commitment collateralized by the project (See Note 3). The assumed construction loan commitment totaling $170.0 million bears interest at a variable rate equal to LIBOR plus 3.70% per annum and matures on May 30, 2015 with two, one-year extension options, subject to certain conditions. At September 30, 2012, there were no amounts outstanding. In addition, the Company assumed an interest rate derivative which caps the one-month LIBOR index rate at a maximum of 3.00% per annum on a notional amount up to $170.0 million and with an expiration date of May 30, 2015. On September 4, 2012, the Company used available cash to repay the mortgage loan collateralized by its Sumner Square property located in Washington, DC totaling approximately $23.2 million. The mortgage financing bore interest at a fixed rate of 7.35% per annum and was scheduled to mature on September 1, 2013. The Company recognized a loss on early extinguishment of debt totaling approximately $0.3 million, which included a prepayment penalty totaling approximately $0.2 million associated with the early repayment.

5. Mortgage Notes Payable

On January 31, 2012, the servicer of the non-recourse mortgage loan collateralized by the Company’s Montvale Center property located in Gaithersburg, Maryland foreclosed on the property. During 2011, the Company had notified the master servicer of the non-recourse mortgage loan that the cash flows generated from the property were insufficient to fund debt service payments and capital improvements necessary to lease and operate the property and that the Company was not prepared to fund any cash shortfalls. The Company was not current on making debt service payments and was accruing interest at the default interest rate of 9.93% per annum. The loan was originally scheduled to mature on June 6, 2012. As a result of the foreclosure, the mortgage loan totaling $25.0 million was extinguished and the related obligations were satisfied with the transfer of the real estate and working capital to the servicer. The Company no longer has any equitable or economic ownership interest in the property. The transaction resulted in a gain on forgiveness of debt of approximately $17.8 million. The operating results of the property through the date of foreclosure have been classified as discontinued operations on a historical basis for all periods presented (See Note 3).

On March 12, 2012, the Company used available cash to repay the mortgage loan collateralized by its Bay Colony Corporate Center property located in Waltham, Massachusetts totaling $143.9 million. The mortgage financing bore interest at a fixed rate of 6.53% per annum and was scheduled to mature on June 11, 2012. There was no prepayment penalty. The Company recognized a gain on early extinguishment of debt totaling approximately $0.9 million related to the acceleration of the remaining balance of the historical fair value adjustment, which was the result of purchase accounting.

On April 2, 2012, the Company used available cash to repay the mortgage loan collateralized by its One Freedom Square property located in Reston, Virginia totaling $65.1 million. The mortgage financing bore interest at a fixed rate of 7.75% per annum and was scheduled to mature on June 30, 2012. There was no prepayment penalty. The Company recognized a gain on early extinguishment of debt totaling approximately $0.3 million related to the acceleration of the remaining balance of the historical fair value debt adjustment, which was the result of purchase accounting.

On August 29, 2012, in connection with the Company’s acquisition of the development project located at 680 Folsom Street in San Francisco, California, the Company assumed the construction loan commitment collateralized by the project (See Note 3). The assumed construction loan commitment totaling $170.0 million bears interest at a variable rate equal to LIBOR plus 3.70% per annum and matures on May 30, 2015 with two, one-year extension options, subject to certain conditions. At September 30, 2012, there were no amounts outstanding. In addition, the Company assumed an interest rate derivative which caps the one-month LIBOR index rate at a maximum of 3.00% per annum on a notional amount up to $170.0 million and with an expiration date of May 30, 2015.

On September 4, 2012, the Company used available cash to repay the mortgage loan collateralized by its Sumner Square property located in Washington, DC totaling approximately $23.2 million. The mortgage financing bore interest at a fixed rate of 7.35% per annum and was scheduled to mature on September 1, 2013. The Company recognized a loss on early extinguishment of debt totaling approximately $0.3 million, which included a prepayment penalty totaling approximately $0.2 million associated with the early repayment.