Real Estate Other (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	$ 249,334	$ 323,837
Investment in real estate, net	20,026,036	20,276,946
Noncontrolling Interests Partially Owned Properties	10,609	4,608
Deposits – restricted	76,946	$ 55,893
Company's Portion [Member]
Land purchase price	76,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	102,500
Joint Venture Partner [Member]
Land purchase price	57,900
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	75,700
Investment in real estate, net	116,700
Noncontrolling Interests Partially Owned Properties	117,300
Accrued Liabilities	1,100
Deposits – restricted	$ 1,700