Related Party Arrangements (Details) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Related Party Arrangements
Management Fees Revenue	$ 2,611,000us-gaap_ManagementFeesRevenue	$ 3,077,000us-gaap_ManagementFeesRevenue
Compensation expense	3,883,000	3,154,000
Unconsolidated real estate entities
Related Party Arrangements
Outstanding receivables	5,009,000		6,868,000
Non-employee directors \| Restricted stock and deferred stock awards
Related Party Arrangements
Compensation expense	271,000	156,000
Amount of deferred compensation	$ 181,000		$ 452,000

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Publisher SEC

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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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.

+ References

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-Publisher FASB

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