Note 23 - Condensed Financial Statements of Parent Company - Parent Company Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity investments (at fair value)	$ 29,494	$ 20,609
Other investments	16,029	10,897
Premises and equipment, net	53,981	56,371
Other assets	31,959	26,075
Total assets	3,916,692	3,576,719
Subordinated debentures, net	103,296	102,891
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	42,741	42,852
Total liabilities	3,562,162	3,249,246
Preferred stock, $1.00 par value, authorized 250,000 shares; issued: 2022 and 2021 - 1,500 shares	14,920	14,920
Common stock and related surplus, $2.50 par value; authorized 20,000,000 shares; issued: 2022 - 12,783,646 shares, 2021 - 12,763,827 shares; outstanding: 2022 - 12,783,646 shares, 2021 - 12,743,125 shares	90,696	89,525
Unallocated common stock held by Employee Stock Ownership Plan - 2021 - 20,702 shares	0	(224)
Retained earnings	260,393	217,770
Accumulated other comprehensive (loss) income	(11,479)	5,482
Total shareholders' equity	354,530	327,473	$ 281,580	$ 247,764
Total liabilities and shareholders' equity	3,916,692	3,576,719
Parent Company [Member]
Cash	11,043	14,279
Investment in subsidiaries	445,048	419,557
Equity investments (at fair value)	25,858	20,209
Other investments	0	0
Premises and equipment, net	92	129
Other assets	1,802	1,971
Total assets	483,843	456,145
Subordinated debentures, net	103,296	102,891
Subordinated debentures owed to unconsolidated subsidiary trusts	19,589	19,589
Other liabilities	6,428	6,192
Total liabilities	129,313	128,672
Preferred stock, $1.00 par value, authorized 250,000 shares; issued: 2022 and 2021 - 1,500 shares	14,920	14,920
Common stock and related surplus, $2.50 par value; authorized 20,000,000 shares; issued: 2022 - 12,783,646 shares, 2021 - 12,763,827 shares; outstanding: 2022 - 12,783,646 shares, 2021 - 12,743,125 shares	90,696	89,525
Unallocated common stock held by Employee Stock Ownership Plan - 2021 - 20,702 shares	0	(224)
Retained earnings	260,393	217,770
Accumulated other comprehensive (loss) income	(11,479)	5,482
Total shareholders' equity	354,530	327,473
Total liabilities and shareholders' equity	$ 483,843	$ 456,145