Note 6 - Earnings Per Share (Details Textual) - shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares)	42,480	38,545
Stock Settled Stock Appreciation Rights SSARs [Member]
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares)	20,188	23,299
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	46,423
Restricted Stock [Member]
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares)	22,292	15,246
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	14,622