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, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Unvested (in shares)		515	593	641
Outstanding, aggregate intrinsic value	[1]	$ 12,784	$ 16,854	$ 7,706	$ 10,250
Unvested, grant date weighted average cost (in dollars per share)		$ 5.08	$ 4.44	$ 4.10
Outstanding, weighted average remaining contractual life (Year)		5 years 1 month 6 days	5 years 1 month 6 days	5 years 1 month 6 days	5 years 3 months 18 days
Awarded (in shares)		34	30	48
Granted, aggregate intrinsic value	[1]	$ 0	$ 0	$ 154
Fair value at grant date (in dollars per share)		$ 12.07	$ 9.69	$ 5.80
Exercised (in shares)		(114)	(108)	(96)
Exercised, aggregate intrinsic value	[1]	$ 5,258	$ 4,239	$ 2,401
Exercised weighted average fair value (in dollars per share)		$ 3.63	$ 2.85	$ 2.88
Forfeited (in shares)		0	0	0
Unvested, grant date weighted average cost (in dollars per share)		$ 6.02	$ 5.08	$ 4.44	$ 4.10
Forfeited (in shares)		0	0	0
Unvested (in shares)		435	515	593	641
Outstanding, exercise price (in dollars per share)		$ 35.60
Outstanding, weighted average fair value (in dollars per share)		$ 6.02	$ 5.08	$ 4.44	$ 4.10
Vested and exercisable (in shares)		307
Vested and exercisable, aggregate intrinsic value	[1]	$ 10,181
Vested and exercisable, weighted average fair value (in dollars per share)		$ 5.06
Vested and exercisable, weighted average remaining contractual life (Year)		4 years 2 months 12 days
Unvested (in shares)		128
Unvested, aggregate intrinsic value	[1]	$ 2,603
Unvested, weighted average fair value (in dollars per share)		$ 8.32
Unvested, weighted average remaining contractual life (Year)		5 years 10 months 24 days
Outstanding (in shares)		435	515	593	641
Outstanding, exercise price (in dollars per share)		$ 35.60
Vested in the current year (in shares)		54
Vested in the current year, aggregate intrinsic value	[1]	$ 1,384
Vested in the current year (in dollars per share)		$ 6.50
Minimum [Member]
Outstanding, exercise price (in dollars per share)		15.24	$ 15.24	$ 14.02
Granted, exercise price (in dollars per share)		47.17	47.17	37.30
Exercised, exercise price (in dollars per share)		15.24	15.24	14.02
Outstanding, exercise price (in dollars per share)		19.37	15.24	15.24	$ 14.02
Vested and exercisable, exercise price (in dollars per share)		19.37
Unvested, exercise price (in dollars per share)		35.90
Outstanding, exercise price (in dollars per share)		19.37	15.24	15.24	14.02
Vested in the current year, exercise price (in dollars per share)		15.24
Maximum [Member]
Outstanding, exercise price (in dollars per share)		50.71	40.00	40.00
Granted, exercise price (in dollars per share)		74.92	50.71	37.30
Exercised, exercise price (in dollars per share)		40.00	19.37	25.76
Outstanding, exercise price (in dollars per share)		74.92	50.71	40.00	40.00
Vested and exercisable, exercise price (in dollars per share)		50.71
Unvested, exercise price (in dollars per share)		74.92
Outstanding, exercise price (in dollars per share)		74.92	50.71	40.00	40.00
Vested in the current year, exercise price (in dollars per share)		50.71
Weighted Average [Member]
Outstanding, exercise price (in dollars per share)		31.16	27.47	25.06
Granted, exercise price (in dollars per share)		55.45	50.48	37.30
Exercised, exercise price (in dollars per share)		21.55	16.40	16.33
Outstanding, exercise price (in dollars per share)		35.60	31.16	27.47	25.06
Vested and exercisable, exercise price (in dollars per share)		31.81
Unvested, exercise price (in dollars per share)		44.69
Outstanding, exercise price (in dollars per share)		35.60	$ 31.16	$ 27.47	$ 25.06
Vested in the current year, exercise price (in dollars per share)		$ 39.36

[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.