Real Estate Investments Total Purchase Price (Details) - Equity One Inc. [Member] $ / shares in Units, shares in Thousands, $ in Thousands	Mar. 01, 2017 USD ($) $ / shares shares
Business Acquisition [Line Items]
Shares of common stock issued for merger (in shares) | shares	65,495
Closing stock price (in usd per share) | $ / shares	$ 68.40
Value of common stock issued for merger	$ 4,471,808
Debt repaid	716,278
Other cash payments	5,019
Total purchase price	$ 5,193,105