Note 10 - Variable Interest Entities ("VIE") - Summary of Restricted Assets and VIE Liabilities (Details) $ in Thousands		Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Real estate, net of accumulated depreciation and amortization of $2,606,653 and $2,500,053, respectively		$ 9,397,045	$ 9,209,053
Cash and cash equivalents		201,687	123,947
Accounts and notes receivable, net		250,150	218,689
Other Assets, Total		214,028	345,012
Assets, Total	[1]	11,559,970	10,997,867
Mortgages and construction loan payable, net		388,406	484,008
Other liabilities		477,545	516,265
Liabilities, Total	[2]	$ 5,923,653	$ 6,051,017
Variable Interest Entity, Unencumbered [Member]
Number of consolidated VIEs		19	19
Variable Interest Entity, Encumbered by Third Party Non-resource Mortgage Debt [Member]
Number of consolidated VIEs		3	4
Variable Interest Entity, Primary Beneficiary [Member]
Number of consolidated VIEs		22	23
Variable Interest Entity, Primary Beneficiary [Member] | Nonrecourse [Member]
Mortgages and construction loan payable, net		$ 37,300	$ 104,500
Other liabilities		27,500	48,900
Liabilities, Total		64,800	153,400
Variable Interest Entity, Primary Beneficiary [Member] | Asset Pledged as Collateral [Member]
Real estate, net of accumulated depreciation and amortization of $2,606,653 and $2,500,053, respectively		98,700	228,900
Cash and cash equivalents		2,200	9,200
Accounts and notes receivable, net		1,700	3,800
Other Assets, Total		1,600	3,600
Assets, Total		$ 104,200	$ 245,500

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at June 30, 2020 and December 31, 2019 of $104,214 and $245,489, respectively. See Footnote 10 of the Notes to Condensed Consolidated Financial Statements.

[2] Includes non-recourse liabilities of consolidated VIEs at June 30, 2020 and December 31, 2019 of $64,780 and $153,436, respectively. See Footnote 10 of the Notes to Condensed Consolidated Financial Statements.