Note 19 - Stock-based Compensation - Restricted Stock (Details) - Restricted Stock [Member] - $ / shares shares in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Unvested (in shares)	99	99
Unvested, grant date weighted average cost (in dollars per share)	$ 41.07	$ 36.85
Awarded (in shares)	30	39
Fair value at grant date (in dollars per share)	$ 59.00	$ 46.90
Restrictions lapsed and shares released (in shares)	(31)	(34)
Restrictions lapsed and shares released (in dollars per share)	$ 47.29	$ 35.48
Forfeited (in shares)	(1)	(5)
Shares forfeited, grant date weighted average cost (in dollars per share)	$ 40.38	$ 40.81
Unvested (in shares)	97	99
Unvested, grant date weighted average cost (in dollars per share)	$ 46.69	$ 41.07