Real Estate Joint Ventures - Summarized Statements of Operations for Unconsolidated Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Investments in and Advances to Affiliates [Line Items]
Total expenses, net	$ 110,006	$ 188,623	$ 130,479
Net loss	1,971	(406,282)	(4,966)
Statements Of Operations
Investments in and Advances to Affiliates [Line Items]
Total expenses, net	3,073	1,952	1,014
Net loss	$ 3,073	$ 1,952	$ 1,014