Note 11 - Variable Interest Entities ("VIE") - Summary of Restricted Assets and VIE Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)
Number of consolidated VIEs	23	24
Restricted Assets:
Real estate, net	$ 219,500	$ 229,200
Cash and cash equivalents	4,400	4,400
Accounts and notes receivable, net	2,800	2,100
Other assets	3,000	3,300
Total Restricted Assets	229,716	239,012
VIE Liabilities:
Mortgages and construction loan payable, net	91,900	83,800
Other liabilities	57,600	59,400
Total VIE Liabilities	$ 149,529	$ 143,186
Variable Interest Entity, Unencumbered [Member]
Number of consolidated VIEs	20	20
Variable Interest Entity, Encumbered by Third Party Non-resource Mortgage Debt [Member]
Number of consolidated VIEs	3	4