Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The carrying amount of the liability as of the balance sheet date to an individual under a deferred compensation arrangement. This amount may be the result of periodic accruals made over the period of active employment, or reflect termination benefits resulting contractual terms or a death benefit.

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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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Revenue, comprised of base and incentive revenue derived from the management of joint ventures, managing third-party properties, or another entity's operations.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Related Party Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Related Party Arrangements
Management Fees Revenue	$ 1,320	$ 2,161	$ 4,310	$ 7,714
Compensation expense			$ 11,555	$ 11,255
Non Employee Director [Member] \| Restricted stock and deferred stock awards
Related Party Arrangements
Restricted stock granted (in shares)			44,327	46,589
Unconsolidated real estate entities
Related Party Arrangements
Outstanding receivables	9,983		$ 9,983		$ 3,832
Non Employee Director [Member] \| Restricted stock and deferred stock awards
Related Party Arrangements
Compensation expense	260	$ 293	877	$ 842
Amount of deferred compensation	$ 693		$ 693		$ 488