Note 19 - Stock-based Compensation - Restricted Stock (Details) - Restricted Stock [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unvested (in shares)	96	99	99
Unvested, grant date weighted average cost (in dollars per share)	$ 47.26	$ 41.07	$ 36.85
Awarded (in shares)	38	35	39
Fair value at grant date (in dollars per share)	$ 63.04	$ 58.47	$ 46.9
Restrictions lapsed and shares vested (in shares)	(33)	(32)	(34)
Restrictions lapsed and shares vested, grant date weighted average cost (in dollars per share)	$ 43.77	$ 40.39	$ 35.48
Forfeited (in shares)	(3)	(6)	(5)
Shares forfeited, grant date weighted average cost (in dollars per share)	$ 53.38	$ 47.49	$ 40.81
Unvested (in shares)	98	96	99
Unvested, grant date weighted average cost (in dollars per share)	$ 54.23	$ 47.26	$ 41.07