Note 19 - Stock-based Compensation - SARs Activity (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2019	Jan. 01, 2022
Unvested (in shares)		515	593
Outstanding, aggregate intrinsic value	[1]	$ 10,813	$ 16,854	$ 7,706	$ 16,854
Unvested, grant date weighted average cost (in dollars per share)		$ 5.08	$ 4.44
Outstanding, weighted average remaining contractual life (Year)		5 years 2 months 12 days	5 years 1 month 6 days	5 years 1 month 6 days
Awarded (in shares)		32	30
Granted, aggregate intrinsic value	[1]	$ 0	$ 0
Fair value at grant date (in dollars per share)		$ 11.79	$ 9.69
Exercised (in shares)		(10)	(108)
Exercised, aggregate intrinsic value	[1]	$ 497	$ 4,239
Exercised weighted average fair value (in dollars per share)		$ 2.62	$ 2.85
Forfeited (in shares)		0
Vested and exercisable (in shares)		398
Vested and exercisable, aggregate intrinsic value	[1]	$ 9,493
Vested and exercisable, weighted average fair value (in dollars per share)		$ 4.69
Vested and exercisable, weighted average remaining contractual life (Year)		4 years 3 months 18 days
Unvested (in shares)		139
Unvested, aggregate intrinsic value	[1]	$ 1,320
Unvested, weighted average fair value (in dollars per share)		$ 7.93
Unvested, weighted average remaining contractual life (Year)		3 years 6 months
Unvested (in shares)		537	515
Unvested, grant date weighted average cost (in dollars per share)		$ 5.53	$ 5.08
Vested in the current year (in shares)		40
Vested in the current year, aggregate intrinsic value	[1]	$ 547
Vested in the current year (in dollars per share)		$ 6.82
Minimum [Member]
Outstanding, exercise price (in dollars per share)		15.24	15.24
Granted, exercise price (in dollars per share)		54.91	47.17
Exercised, exercise price (in dollars per share)		15.24	15.24
Vested and exercisable, exercise price (in dollars per share)		15.24
Unvested, exercise price (in dollars per share)		35.90
Outstanding, exercise price (in dollars per share)		15.24	15.24
Vested in the current year, exercise price (in dollars per share)		35.90
Maximum [Member]
Outstanding, exercise price (in dollars per share)		50.71	40.00
Granted, exercise price (in dollars per share)		54.91	50.71
Exercised, exercise price (in dollars per share)		15.24	19.37
Vested and exercisable, exercise price (in dollars per share)		50.71
Unvested, exercise price (in dollars per share)		54.91
Outstanding, exercise price (in dollars per share)		54.91	50.71
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
Granted, exercise price (in dollars per share)		54.91	50.48
Exercised, exercise price (in dollars per share)		15.24	16.40
Vested and exercisable, exercise price (in dollars per share)		29.03
Unvested, exercise price (in dollars per share)		43.89
Outstanding, exercise price (in dollars per share)		32.88	$ 31.16
Vested in the current year, exercise price (in dollars per share)		$ 39.36

[1] 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.