Note 9 - Leases - Lease Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fixed lease income	[1]			$ 720,174	$ 659,913
Variable lease income	[2]			181,980	173,216
Above-market and below-market leases amortization, net				11,915	17,500
Total lease income		$ 364,694	$ 256,607	929,297	778,572
COVID 19 [Member]
Adjustments for potentially uncollectible revenues and disputed amounts	[3]			$ 15,228	$ (72,057)

[1] Includes minimum base rents, expense reimbursements, ancillary income and straight-line rent adjustments.

[2] Includes minimum base rents, expense reimbursements, percentage rent, lease termination fee income and ancillary income.

[3] The amounts represent adjustments associated with potentially uncollectible revenues and disputed amounts primarily due to the COVID-19 pandemic.