Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Mar. 01, 2017
Subsequent Event [Line Items]
Net income (loss) attributable to common stockholders	$ 85,138	$ 59,666	$ 48,368	$ (33,223)	$ 55,868	$ 5,305	$ 34,810	$ 47,877
Equity One Inc. [Member]
Subsequent Event [Line Items]
Business Acquisition, Share Price												$ 68.40
Parent Company [Member]
Subsequent Event [Line Items]
Repayment of fixed rate unsecured notes									$ 0	$ 300,000	$ 450,000
Net income (loss) attributable to common stockholders									$ 159,949	$ 143,860	$ 128,994
Preferred stock, liquidation preferences per share	$ 25				$ 25				$ 25	$ 25
Common Stock, Par or Stated Value Per Share	$ 0.01				$ 0.01				$ 0.01	$ 0.01