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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Related Party Arrangements (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Related Party Arrangements
Compensation expense			$ 9,843	$ 8,950
Unconsolidated real estate entities
Related Party Arrangements
Outstanding receivables	$ 2,374		2,374		$ 2,449
Non Employee Director \| Restricted stock and deferred stock awards
Related Party Arrangements
Compensation expense	357	$ 388	746	$ 759
Amount of deferred compensation	$ 1,284		$ 1,284		$ 525