Note 19 - Subsequent Events	9 Months Ended
Sep. 30, 2011
Subsequent Events [Text Block]	19. Subsequent Events During October 2011, the Company established a new $1.75 billion senior unsecured revolving credit facility (the “New Credit Facility”) with a group of banks, which is scheduled to expire in October 2015 and has a one-year extension option. This credit facility, which replaces the Company’s $1.5 billion unsecured U.S. credit facility and CAD $250.0 million credit facility, provides funds to finance general corporate purposes, including (i) property acquisitions, (ii) investments in the Company’s institutional management programs, (iii) development and redevelopment costs and (iv) any short-term working capital requirements. Interest on borrowings under the New Credit Facility accrues at LIBOR plus 1.05% and fluctuates in accordance with changes in the Company’s senior debt ratings and has a facility fee of 0.20% per annum. As part of this New Credit Facility, the Company has a competitive bid option whereby the Company could auction up to $875.0 million of its requested borrowings to the bank group. This competitive bid option provides the Company the opportunity to obtain pricing below the currently stated spread. In addition, as part of the New Credit Facility, the Company has a $500.0 million sub-limit which provides it the opportunity to borrow in alternative currencies such as Canadian Dollars, Pounds Sterling, Japanese Yen or Euros. Pursuant to the terms of the New Credit Facility, the Company, among other things, is subject to covenants requiring the maintenance of (i) maximum leverage ratios on both unsecured and secured debt and (ii) minimum interest and fixed coverage ratios.

Note 19 - Subsequent Events

9 Months Ended

Sep. 30, 2011

19. Subsequent Events

During October 2011, the Company established a new $1.75 billion senior unsecured revolving credit facility (the “New Credit Facility”) with a group of banks, which is scheduled to expire in October 2015 and has a one-year extension option. This credit facility, which replaces the Company’s $1.5 billion unsecured U.S. credit facility and CAD $250.0 million credit facility, provides funds to finance general corporate purposes, including (i) property acquisitions, (ii) investments in the Company’s institutional management programs, (iii) development and redevelopment costs and (iv) any short-term working capital requirements. Interest on borrowings under the New Credit Facility accrues at LIBOR plus 1.05% and fluctuates in accordance with changes in the Company’s senior debt ratings and has a facility fee of 0.20% per annum. As part of this New Credit Facility, the Company has a competitive bid option whereby the Company could auction up to $875.0 million of its requested borrowings to the bank group. This competitive bid option provides the Company the opportunity to obtain pricing below the currently stated spread. In addition, as part of the New Credit Facility, the Company has a $500.0 million sub-limit which provides it the opportunity to borrow in alternative currencies such as Canadian Dollars, Pounds Sterling, Japanese Yen or Euros. Pursuant to the terms of the New Credit Facility, the Company, among other things, is subject to covenants requiring the maintenance of (i) maximum leverage ratios on both unsecured and secured debt and (ii) minimum interest and fixed coverage ratios.