Note 19 - Stock-based Compensation - SARs Activity (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unvested (in shares)		435	515	593
Outstanding, aggregate intrinsic value	[1]	$ 6,297	$ 12,784	$ 16,854	$ 7,706
Unvested, grant date weighted average cost (in dollars per share)		$ 6.02	$ 5.08	$ 4.44
Outstanding, weighted average remaining contractual life (Year)		4 years 8 months 12 days	5 years 1 month 6 days	5 years 1 month 6 days	5 years 1 month 6 days
Awarded (in shares)		29	34	30
Granted, aggregate intrinsic value	[1]	$ 0	$ 0	$ 0
Fair value at grant date (in dollars per share)		$ 16.81	$ 12.07	$ 9.69
Exercised (in shares)		(24)	(114)	(108)
Exercised, aggregate intrinsic value	[1]	$ 681	$ 5,258	$ 4,239
Exercised weighted average fair value (in dollars per share)		$ 3.58	$ 3.63	$ 2.85
Forfeited (in shares)		0	0	0
Unvested, grant date weighted average cost (in dollars per share)		$ 6.86	$ 6.02	$ 5.08	$ 4.44
Forfeited (in shares)		0	0	0
Unvested (in shares)		440	435	515	593
Outstanding, exercise price (in dollars per share)		$ 38.11
Outstanding, weighted average fair value (in dollars per share)		$ 6.86	$ 6.02	$ 5.08	$ 4.44
Vested and exercisable (in shares)		336
Vested and exercisable, aggregate intrinsic value	[1]	$ 5,851
Vested and exercisable, weighted average fair value (in dollars per share)		$ 5.5
Vested and exercisable, weighted average remaining contractual life (Year)		3 years 9 months 18 days
Unvested (in shares)		104
Unvested, aggregate intrinsic value	[1]	$ 446
Unvested, weighted average fair value (in dollars per share)		$ 11.22
Unvested, weighted average remaining contractual life (Year)		3 years 4 months 24 days
Outstanding (in shares)		440	435	515	593
Outstanding, exercise price (in dollars per share)		$ 38.11
Vested in the current year (in shares)		52
Vested in the current year, aggregate intrinsic value	[1]	$ 531
Vested in the current year (in dollars per share)		$ 7.25
Minimum [Member]
Outstanding, exercise price (in dollars per share)		19.37	$ 15.24	$ 15.24
Granted, exercise price (in dollars per share)		60.76	47.17	47.17
Exercised, exercise price (in dollars per share)		19.37	15.24	15.24
Outstanding, exercise price (in dollars per share)		19.44	19.37	15.24	$ 15.24
Vested and exercisable, exercise price (in dollars per share)		19.44
Unvested, exercise price (in dollars per share)		36.65
Outstanding, exercise price (in dollars per share)		19.44	19.37	15.24	15.24
Vested in the current year, exercise price (in dollars per share)		35.9
Maximum [Member]
Outstanding, exercise price (in dollars per share)		74.92	50.71	40
Granted, exercise price (in dollars per share)		60.76	74.92	50.71
Exercised, exercise price (in dollars per share)		19.37	40	19.37
Outstanding, exercise price (in dollars per share)		74.92	74.92	50.71	40
Vested and exercisable, exercise price (in dollars per share)		74.92
Unvested, exercise price (in dollars per share)		74.92
Outstanding, exercise price (in dollars per share)		74.92	74.92	50.71	40
Vested in the current year, exercise price (in dollars per share)		74.92
Weighted Average [Member]
Outstanding, exercise price (in dollars per share)		35.6	31.16	27.47
Granted, exercise price (in dollars per share)		60.76	55.45	50.48
Exercised, exercise price (in dollars per share)		19.37	21.55	16.4
Outstanding, exercise price (in dollars per share)		38.11	35.6	31.16	27.47
Vested and exercisable, exercise price (in dollars per share)		34.15
Unvested, exercise price (in dollars per share)		50.83
Outstanding, exercise price (in dollars per share)		38.11	$ 35.6	$ 31.16	$ 27.47
Vested in the current year, exercise price (in dollars per share)		$ 41.34

[1] Aggregate intrinsic value for SARs is defined as the amount by which the current market price of the underlying stock exceeds the exercise or grant price.