Related Party Arrangements (Details) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Arrangements
Compensation expense	$ 17,775,000	$ 9,961,000	$ 9,721,000
Unconsolidated real estate entities
Related Party Arrangements
Asset management, property management, development and redevelopment fee revenue	11,502,000	10,257,000	9,656,000
Outstanding receivables	7,004,000	3,484,000
Non-employee directors
Related Party Arrangements
Payable to related parties	60,000
Payable to related parties in quarterly installments	15,000
Non-employee directors \| Restricted stock and deferred stock awards
Related Party Arrangements
Payable to related parties	125,000
Compensation expense	992,000	880,000	778,000
Amount of deferred compensation	417,000	364,000
Lead Independent Director
Related Party Arrangements
Payable to related parties	30,000
Payable to related parties in quarterly installments	$ 7,500

For an unclassified balance sheet, amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership.

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Amounts due to recorded owners or owners with a beneficial interest of more than 10 percent of the voting interests or officers of the company.

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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