Note 12 - Fair Value Measurements - Estimate of Fair Value Differs From Carrying Amounts (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Notes payable, net	[1]	$ 7,110,804	$ 7,027,050
Reported Value Measurement [Member] | Mortgages [Member]
Mortgages payable, net	[2]	378,644	448,652
Estimate of Fair Value Measurement [Member]
Notes payable, net	[1]	6,875,691	7,330,723
Estimate of Fair Value Measurement [Member] | Mortgages [Member]
Mortgages payable, net	[2]	$ 361,700	$ 449,758

[1] The Company determined that the valuation of its senior unsecured notes were classified within Level 2 of the fair value hierarchy and its Credit Facility was classified within Level 3 of the fair value hierarchy. The estimated fair value amounts classified as Level 2, as of March 31, 2022 and December 31, 2021, were $6.9 billion and $7.3 billion, respectively.

[2] The Company determined that its valuation of its mortgages payable were classified within Level 3 of the fair value hierarchy.