Subsequent Events	9 Months Ended
Sep. 30, 2015
Subsequent Events [Abstract]
Subsequent Events [Text Block]	22. Subsequent Events 20 Broad Street On October 19, 2015, we entered into an agreement to sell our leasehold interest in 20 Broad Street, a 473,000 square foot office building in Manhattan. We ground lease this property, which is contiguous to the New York Stock Exchange (“NYSE”), from the NYSE, who is also the major tenant in the building. By agreement, we early terminated the NYSE space lease which was scheduled to expire in June 2016. The aggregate consideration for the sale of the leasehold and the early termination of the NYSE lease is $200,000,000 or $423 per square foot. The total income from this transaction is approximately $156,000,000 comprised of $141,000,000 from the gain on sale and $15,000,000 of lease termination income. The sale, which is subject to customary closing conditions, is expected to be completed in the fourth quarter of 2015. Unsecured Term Loan Facility On October 30, 2015, we entered into an unsecured delayed-draw term loan facility in the maximum amount of $750,000,000. The facility matures in October 2018 with two one-year extension options. The interest rate is LIBOR plus 115 basis points with a fee of 20 basis points per annum on the unused portion. At closing, we drew $187,500,000. The facility provides that the maximum amount available is twice the amount outstanding on April 29, 2016, limited to $750,000,000, and all draws must be made by October 2017.

Subsequent Events

9 Months Ended

Sep. 30, 2015

22. Subsequent Events

20 Broad Street

On October 19, 2015, we entered into an agreement to sell our leasehold interest in 20 Broad Street, a 473,000 square foot office building in Manhattan. We ground lease this property, which is contiguous to the New York Stock Exchange (“NYSE”), from the NYSE, who is also the major tenant in the building. By agreement, we early terminated the NYSE space lease which was scheduled to expire in June 2016. The aggregate consideration for the sale of the leasehold and the early termination of the NYSE lease is $200,000,000 or $423 per square foot. The total income from this transaction is approximately $156,000,000 comprised of $141,000,000 from the gain on sale and $15,000,000 of lease termination income. The sale, which is subject to customary closing conditions, is expected to be completed in the fourth quarter of 2015.

Unsecured Term Loan Facility

On October 30, 2015, we entered into an unsecured delayed-draw term loan facility in the maximum amount of $750,000,000. The facility matures in October 2018 with two one-year extension options. The interest rate is LIBOR plus 115 basis points with a fee of 20 basis points per annum on the unused portion. At closing, we drew $187,500,000. The facility provides that the maximum amount available is twice the amount outstanding on April 29, 2016, limited to $750,000,000, and all draws must be made by October 2017.