Note 6 - Investment and Advances in Real Estate Joint Ventures - Investment and Advances to Real Estate Joint Ventures - Income Statements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues, net	$ 1,783,400	$ 1,727,684	$ 1,364,585
Operating expenses	(1,219,599)	(1,177,399)	(971,140)
Depreciation and amortization	(507,265)	(505,000)	(395,320)
Interest expense	(250,201)	(226,823)	(204,133)
Other expense, net	39,960	28,829	19,810
Net income	654,273	125,976	844,059
Impairment charges	(14,043)	(21,958)	(3,597)
Net income	665,949	114,534	849,696
KIR [Member]
Revenues, net	174,100	182,500	186,600
Operating expenses	(46,700)	(48,200)	(51,300)
Depreciation and amortization	(38,500)	(39,400)	(40,300)
Gain on sale of properties	0	76,200	0
Interest expense	(16,800)	(15,500)	(18,100)
Other expense, net	(600)	(1,200)	(2,100)
Net income	71,500	154,400	74,800
Excluding KIR [Member]
Revenues, net	378,400	395,200	340,300
Operating expenses	(126,600)	(126,900)	(111,700)
Depreciation and amortization	(108,200)	(119,000)	(97,200)
Gain on sale of properties	48,000	24,700	61,500
Interest expense	(55,400)	(38,600)	(27,600)
Other expense, net	(6,400)	(6,200)	(900)
Impairment charges	(17,800)	(21,100)	(23,500)
Net income	$ 112,000	$ 108,100	$ 140,900