Note 20 - Equity Incentive Plans - Restricted Stock Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Time-based Restricted Stock Units [Member]
Balance (in shares)	202,059	235,944	292,670
Balance, weighted-average grant date fair value (in dollars per share)	$ 33.29	$ 32.38	$ 33.37
Granted (in shares)	86,809	67,652	63,467
Granted, weighted-average grant date fair value (in dollars per share)	$ 37.92	$ 46.69	$ 41.18
Vested (in shares)	(92,075)	(89,386)	(96,869)
Vested, weighted-average grant date fair value (in dollars per share)	$ 34.29	$ 40.92	$ 41.72
Forfeited (in shares)	(2,404)	(12,151)	(23,324)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 37.77	$ 34.07	$ 29.92
Balance (in shares)	194,389	202,059	235,944
Balance, weighted-average grant date fair value (in dollars per share)	$ 34.83	$ 33.29	$ 32.38
Performance-based Restricted Stock Units [Member]
Balance (in shares)	362,965	332,506	302,802
Balance, weighted-average grant date fair value (in dollars per share)	$ 31.56	$ 31.82	$ 32.55
Granted (in shares)	123,504	112,393	113,764
Granted, weighted-average grant date fair value (in dollars per share)	$ 38.41	$ 40.24	$ 37.13
Vested (in shares)	(136,808)	(81,934)	(76,292)
Vested, weighted-average grant date fair value (in dollars per share)	$ 34.21	$ 44.52	$ 41.69
Forfeited (in shares)	0	0	(7,768)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 0	$ 0	$ 40.85
Balance (in shares)	349,661	362,965	332,506
Balance, weighted-average grant date fair value (in dollars per share)	$ 32.94	$ 31.56	$ 31.82