Note 22 - Incentive Plans - Performance Shares Activity (Details) - Performance Shares [Member] - shares		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restricted stock outstanding as of January 1, (in shares)		913,800	704,530	433,230
Granted (1) (in shares)	[1]	545,380	506,720	407,080
Vested (in shares)	[2]	(407,080)	(297,450)	(135,780)
Restricted stock outstanding as of December 31, (in shares)		1,052,100	913,800	704,530

[1] The weighted-average grant date fair value for performance shares issued during the years ended December 31, 2021, 2020 and 2019 were $22.96, $18.02 and $22.00, respectively.

[2] For the years ended December 31, 2021, 2020 and 2019, the corresponding common stock equivalent of these vested awards were 814,160, 594,900 and 104,551 shares, respectively.