Subsequent Events	6 Months Ended
Jun. 30, 2014
Subsequent Events [Abstract]
Subsequent Events [Text Block]	21. Subsequent Events On July 9, 2014, we entered into an agreement, in partnership with Crown Acquisitions (“Crown”), to acquire the retail condominium of the St. Regis Hotel and the adjacent retail townhouse, for approximately $700,000,000. The property has 100 feet of frontage on Fifth Avenue on the Southeast corner of 55th Street. We will own between 67% and 80% of the venture, with Crown owning the balance. The final ownership percentages will be based on the amount of debt financing put on the property and Crown's short-term option to invest additional capital. The purchase is expected to close in the fourth quarter of 2014, subject to customary closing conditions. On July 16, 2014, we completed a $130,000,000 financing of Las Catalinas, a 494,000 square foot mall located in Caguas, Puerto Rico, in the San Juan area. The 10-year fixed rate loan bears interest at 4.43% and amortizes based on a 30-year schedule beginning in year six. On July 23, 2014, a joint venture in which we are a 50% partner entered into a 99-year ground lease for 61 Ninth Avenue located on the Southwest corner of Ninth Avenue and 15th Street in Manhattan. The venture's current plans are to construct an office and retail building of approximately 130,000 square feet. Total development costs are currently estimated to be approximately $125,000,000. On August 1, 2014, we acquired the land under our 715 Lexington Avenue retail property located on the Southeast corner of 58th Street and Lexington Avenue in Manhattan, for $63,000,000. On August 5, 2014, we called for redemption of all of the $445,000,000 principal amount of our outstanding 7.875% senior unsecured notes. The notes, which were scheduled to mature on October 1, 2039, will be redeemed on October 1, 2014 at a redemption price of 100% of the principal amount plus accrued interest to the redemption date.

Subsequent Events

6 Months Ended

Jun. 30, 2014

21. Subsequent Events

On July 9, 2014, we entered into an agreement, in partnership with Crown Acquisitions (“Crown”), to acquire the retail condominium of the St. Regis Hotel and the adjacent retail townhouse, for approximately $700,000,000. The property has 100 feet of frontage on Fifth Avenue on the Southeast corner of 55th Street. We will own between 67% and 80% of the venture, with Crown owning the balance. The final ownership percentages will be based on the amount of debt financing put on the property and Crown's short-term option to invest additional capital. The purchase is expected to close in the fourth quarter of 2014, subject to customary closing conditions.

On July 16, 2014, we completed a $130,000,000 financing of Las Catalinas, a 494,000 square foot mall located in Caguas, Puerto Rico, in the San Juan area. The 10-year fixed rate loan bears interest at 4.43% and amortizes based on a 30-year schedule beginning in year six.

On July 23, 2014, a joint venture in which we are a 50% partner entered into a 99-year ground lease for 61 Ninth Avenue located on the Southwest corner of Ninth Avenue and 15th Street in Manhattan. The venture's current plans are to construct an office and retail building of approximately 130,000 square feet. Total development costs are currently estimated to be approximately $125,000,000.

On August 1, 2014, we acquired the land under our 715 Lexington Avenue retail property located on the Southeast corner of 58th Street and Lexington Avenue in Manhattan, for $63,000,000.

On August 5, 2014, we called for redemption of all of the $445,000,000 principal amount of our outstanding 7.875% senior unsecured notes. The notes, which were scheduled to mature on October 1, 2039, will be redeemed on October 1, 2014 at a redemption price of 100% of the principal amount plus accrued interest to the redemption date.