Note 7 - Leases - Lease Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020		Sep. 30, 2019
Fixed lease income (1)	[1]			$ 596,105		$ 651,839
Variable lease income (2)	[2]			164,967		181,898
Above-market and below-market leases amortization, net				17,500		16,788
Total lease income (3)		$ 256,607	$ 279,181	$ 778,572	[3]	$ 850,525	[3]

[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] During the nine months ended September 30, 2020, the Company's revenue was reduced by $72.2 million associated with potentially uncollectible revenues, including revenues from tenants that are being accounted for on a cash basis, and disputed amounts, which includes $15.1 million for straight-line rent receivables, primarily attributable to the COVID-19 pandemic.