Historic Tax Credits (Notes)	9 Months Ended
Sep. 30, 2017
Historic Tax Credits [Abstract]
Historic Tax Credits [Text Block]	HISTORIC TAX CREDITS In the second quarter of 2012, we closed a transaction with a counterparty (the “Counterparty”) related to the historic rehabilitation of an office building located at 801 Market Street in Philadelphia, Pennsylvania (the “Project”), which has two stages of development. The Counterparty contributed equity of $5.5 million to the first stage through December 31, 2013 and $5.8 million to the second stage through September 30, 2014. In exchange for its contributions into the Project, the Counterparty received substantially all of the historic rehabilitation tax credits associated with the Project as a distribution. The Counterparty’s contributions, other than the amounts allocated to a put option (whereby we might be obligated or entitled to repurchase the Counterparty’s ownership interest in the Project), are classified as “Accrued expenses and other liabilities” and recognized as “Other income” in the consolidated financial statements as our obligation to deliver tax credits is relieved. The tax credits are subject to a five year credit recapture period, as defined in the Internal Revenue Code of 1986, as amended, beginning one year after the completion of the Project, which was the second quarter of 2012 for the first stage and the second quarter of 2013 for the second stage. Our obligation to the Counterparty with respect to the tax credits is ratably relieved annually in the third quarter of each year, upon the expiration of each portion of the recapture period and the satisfaction of other revenue recognition criteria. With regard to the first stage, we recognized the contribution received of $0.9 million from the Counterparty as “Other income” in each of the third quarters of 2017 and 2016, respectively, for the fifth and final recapture period and the fourth recapture period. With regard to the second stage, we recognized the contribution received of $1.0 million in each of the third quarters of 2017 and 2016, respectively related to the fourth and third recapture periods. We also recorded $0.2 million of priority returns earned by the Counterparty in each of the three and nine months ended September 30, 2017 and 2016. In the aggregate, we recorded net income of $1.8 million to “Other income” in the consolidated statements of operations in connection with the Project in each of the three and nine months ended September 30, 2017 and 2016, respectively.

HISTORIC TAX CREDITS

In the second quarter of 2012, we closed a transaction with a counterparty (the “Counterparty”) related to the historic rehabilitation of an office building located at 801 Market Street in Philadelphia, Pennsylvania (the “Project”), which has two stages of development. The Counterparty contributed equity of $5.5 million to the first stage through December 31, 2013 and $5.8 million to the second stage through September 30, 2014. In exchange for its contributions into the Project, the Counterparty received substantially all of the historic rehabilitation tax credits associated with the Project as a distribution. The Counterparty’s contributions, other than the amounts allocated to a put option (whereby we might be obligated or entitled to repurchase the Counterparty’s ownership interest in the Project), are classified as “Accrued expenses and other liabilities” and recognized as “Other income” in the consolidated financial statements as our obligation to deliver tax credits is relieved.

The tax credits are subject to a five year credit recapture period, as defined in the Internal Revenue Code of 1986, as amended, beginning one year after the completion of the Project, which was the second quarter of 2012 for the first stage and the second quarter of 2013 for the second stage. Our obligation to the Counterparty with respect to the tax credits is ratably relieved annually in the third quarter of each year, upon the expiration of each portion of the recapture period and the satisfaction of other revenue recognition criteria.

With regard to the first stage, we recognized the contribution received of $0.9 million from the Counterparty as “Other income” in each of the third quarters of 2017 and 2016, respectively, for the fifth and final recapture period and the fourth recapture period. With regard to the second stage, we recognized the contribution received of $1.0 million in each of the third quarters of 2017 and 2016, respectively related to the fourth and third recapture periods. We also recorded $0.2 million of priority returns earned by the Counterparty in each of the three and nine months ended September 30, 2017 and 2016. In the aggregate, we recorded net income of $1.8 million to “Other income” in the consolidated statements of operations in connection with the Project in each of the three and nine months ended September 30, 2017 and 2016, respectively.