Note 19 - Stock-based Compensation - Options and SARS Outstanding (Details) shares in Thousands	Dec. 31, 2022 $ / shares shares
Number of SARs outstanding (in shares)	435
SARs exercisable (in shares)	307
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 35.60
Stock Options and Stock Appreciation Rights SARs Expiring in 2023 [Member]
Number of SARs outstanding (in shares)	0
SARs exercisable (in shares)	0
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 0
Stock Options and Stock Appreciation Rights SARs Expiring in 2024 [Member]
Number of SARs outstanding (in shares)	27
SARs exercisable (in shares)	27
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 19.38
Stock Options and Stock Appreciation Rights SARs Expiring in 2025 [Member]
Number of SARs outstanding (in shares)	39
SARs exercisable (in shares)	39
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 23.02
Stock Options and Stock Appreciation Rights SARs Expiring in 2026 [Member]
Number of SARs outstanding (in shares)	76
SARs exercisable (in shares)	76
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 25.76
Stock Appreciation Rights SARs Expiring in 2027 [Member]
Number of SARs outstanding (in shares)	40
SARs exercisable (in shares)	40
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 40.00
Stock Appreciation Rights SARs Expiring in 2028 [Member]
Number of SARs outstanding (in shares)	95
SARs exercisable (in shares)	76
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 37.84
Stock Appreciation Rights SARs Expiring in 2029 [Member]
Number of SARs outstanding (in shares)	47
SARs exercisable (in shares)	26
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 37.06
Stock Appreciation Rights SARs Expiring In 2030 [Member]
Number of SARs outstanding (in shares)	46
SARs exercisable (in shares)	17
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 37.30
Stock Appreciation Rights SARs Expiring In 2031 [Member]
Number of SARs outstanding (in shares)	31
SARs exercisable (in shares)	6
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 50.48
Stock Appreciation Rights SARs Expiring In 2032 [Member]
Number of SARs outstanding (in shares)	34
SARs exercisable (in shares)	0
Weighted average exercise price of SARs outstanding (in dollars per share) | $ / shares	$ 55.45