Note 20 - Equity Incentive Plans - Restricted Stock Units (Details) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Time-based Restricted Stock Units [Member]
Balance (in shares)	235,944	292,670	273,200
Balance, weighted-average grant date fair value (in dollars per share)	$ 32.38	$ 33.37	$ 35.90
Granted (in shares)	67,652	63,467	110,495
Granted, weighted-average grant date fair value (in dollars per share)	$ 46.69	$ 41.18	$ 21.79
Vested (in shares)	(89,386)	(96,869)	(80,654)
Vested, weighted-average grant date fair value (in dollars per share)	$ 40.92	$ 41.72	$ 25.34
Forfeited (in shares)	(12,151)	(23,324)	(10,371)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 34.07	$ 29.92	$ 39.04
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
Performance-based Restricted Stock Units [Member]
Balance (in shares)	332,506	302,802	297,744
Balance, weighted-average grant date fair value (in dollars per share)	$ 31.82	$ 32.55	$ 32.65
Granted (in shares)	112,393	113,764	212,369
Granted, weighted-average grant date fair value (in dollars per share)	$ 40.24	$ 37.13	$ 22.96
Vested (in shares)	(81,934)	(76,292)	(193,240)
Vested, weighted-average grant date fair value (in dollars per share)	$ 44.52	$ 41.69	$ 21.68
Forfeited (in shares)	0	(7,768)	(14,071)
Forfeited, weighted-average grant date fair value (in dollars per share)	$ 0	$ 40.85	$ 39.08
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