Real Estate Investments Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 01, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Total liabilities assumed	$ 0		$ 0
Equity One Inc. [Member]
Business Acquisition [Line Items]
Land		$ 3,019,448
Building and improvements		2,651,506
Properties in development		70,179
Properties held for sale		19,600
Investments in unconsolidated real estate partnerships		103,566
Real estate assets		5,864,299
Cash, accounts receivable and other assets		112,271
Intangible assets		463,882
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		246,619
Total assets acquired		6,687,071
Notes payable		757,399
Accounts payable, accrued expenses, and other liabilities		120,616
Lease intangible liabilities		615,951
Total liabilities assumed		1,493,966
Total purchase price		$ 5,193,105