Note 7 - Investment and Advances in Real Estate Joint Ventures - Investment and Advances to Real Estate Joint Ventures - Balance Sheets (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Dec. 31, 2021
Total real estate, net		$ 15,039,828	$ 15,041,572
Other assets		253,779	195,715
Assets, Total	[1]	17,826,122	18,459,199
Notes payable, net		6,780,969	7,027,050
Secured Debt, Total		376,917	448,652
Other Liabilities, Total		601,574	510,382
Members’ capital		9,515,508	9,899,389
Total Liabilities and Members’ Capital		17,826,122	18,459,199
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance		131,401	210,793
KIR [Member]
Total real estate, net		668,700	769,400
Other assets		72,400	68,200
Assets, Total		741,100	837,600
Notes payable, net		272,900	258,800
Secured Debt, Total		25,000	233,700
Other Liabilities, Total		13,900	16,200
Members’ capital		429,300	328,900
Total Liabilities and Members’ Capital		741,100	837,600
Excluding KIR [Member]
Total real estate, net		3,440,100	3,619,400
Other assets		208,400	193,800
Assets, Total		3,648,500	3,813,200
Notes payable, net		159,500	199,000
Secured Debt, Total		925,900	947,200
Other Liabilities, Total		78,800	73,800
Members’ capital		2,450,800	2,560,600
Total Liabilities and Members’ Capital		3,648,500	3,813,200
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance		$ 33,500	$ 32,600

[1] Includes restricted assets of consolidated variable interest entities (“VIEs”) at September 30, 2022 and December 31, 2021 of $88,949 and $227,858, respectively. See Footnote 13 of the Notes to Condensed Consolidated Financial Statements.