Investments in and Advances To Joint Ventures (Details 3) (Unconsolidated Joint Ventures [Member], USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Unconsolidated Joint Ventures [Member]
Service fees and income earned by the Company's unconsolidated joint ventures
Management and other fees	$ 7.0	$ 8.3	$ 21.7	$ 25.2
Financing and other fees	0.3			0.2
Development fees and leasing commissions	1.6	1.5	5.3	5.2
Interest income		$ 0.1	$ 0.1	$ 0.3

Acquisition financing and other fees related to unconsolidated joint ventures revenue.

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Revenue recognition from unconsolidated joint ventures in accordance with management contracts such as development fees and leasing commissions.

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This element represents interest earned on the notes receivable from unconsolidated joint ventures.

Revenue recognition from unconsolidated joint ventures in accordance with management contracts for collection of management fees.

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Service fees and income earned by the Company's unconsolidated joint ventures.

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