Note 3 - Property Acquisitions, Developments and Other Investments - Previous Ownership Interest and Gain on Change of Interest (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Gain on change in control of interests, net	$ 71,160
Plantation Commons [Member]
Previous ownership interest	76.25%
Gain on change in control of interests, net	$ 9,793
Gordon Plaza [Member]
Previous ownership interest	40.62%
Gain on change in control of interests, net	$ 395
The District at Tustin Legacy [Member]
Previous ownership interest		[1]
Gain on change in control of interests, net	$ 60,972

[1] The Company's share of this investment is subject to change and is based upon a cash flow waterfall provision within the partnership agreement (54.27% as of date of consolidation).