Note 16 - Incentive Plans - Restricted Stock Activity (Details) - Restricted Stock [Member] - shares		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Performance share awards outstanding as of January 1, (in shares)		2,746,116	2,605,970
Granted (1) (in shares)	[1]	872,150	893,320
Vested (2) (in shares)		(679,546)	(705,374)
Forfeited (in shares)		(15,562)	(2,168)
Performance share awards outstanding as of March 31, (in shares)		2,923,158	2,791,748

[1] The weighted-average grant date fair value for restricted stock issued during the three months ended March 31, 2024 and 2023 were $19.47 and $21.30, respectively.