Note 20 - Incentive Plans - Performance Shares Activity (Details) - Performance Shares [Member] - shares		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restricted stock outstanding as of January 1, (in shares)		433,230	235,950	197,249
Granted (1) (in shares)	[1]	407,080	297,450	135,780
Vested (in shares)	[2]	(135,780)	(100,170)	(97,079)
Restricted stock outstanding as of December 31, (in shares)		704,530	433,230	235,950

[1] The weighted-average grant date fair value for performance shares issued during the years ended December 31, 2019, 2018 and 2017 were $22.00, $15.40 and $23.35, respectively.

[2] For the years ended December 31, 2019, 2018 and 2017, the corresponding common stock equivalent of these vested awards were 104,551, 0 and 0 shares, respectively.