Note 8 - Leases - Lease Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Fixed lease income (1)	[1]			$ 436,263	$ 443,887
Variable lease income (2)	[2]			115,995	115,018
Above-market and below-market leases amortization, net				8,933	13,524
Total lease income		$ 285,732	$ 235,961	564,603	521,965
COVID 19 [Member]
Adjustments for potentially uncollectible revenues and disputed amounts (3)	[3]			$ 3,412	$ (50,464)

[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.