Note 17 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Millions				9 Months Ended
	Aug. 03, 2021	Jul. 15, 2021	Apr. 15, 2021	Sep. 30, 2021	Aug. 31, 2021	Dec. 31, 2020	Feb. 28, 2020
Common Stock, Par or Stated Value Per Share (in dollars per share)				$ 0.01		$ 0.01
Weingarten Realty Investors [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Per Each Acquired Company Share (in shares)	1.408	1.408	1.408
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	179,919,880
ATM Program [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)					$ 0.01
Sales of Stock Maximum Sales Price					$ 500.0
Stock Issued During Period, Shares, New Issues (in shares)				3,515,500
Proceeds from Issuance of Common Stock, Net				$ 76.9
Common Stock Available for Issuance, Value				$ 422.4
Share Repurchase Program [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)							$ 0.01
Stock Repurchase Program, Authorized Amount							$ 300.0
Stock Repurchased During Period, Shares (in shares)				0
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 224.9