Note 20 - Regulatory Matters - Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations (Details) $ in Thousands		Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual		$ 379,074	$ 367,445
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual		0.1073	0.114
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum		$ 158,974	$ 145,101
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum		0.045	0.045
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Well Capitalized, Minimum	[1]	$ 229,629	$ 209,590
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum	[1]	0.065	0.065
Banking Regulation, Tier 1 Risk-Based Capital, Actual		$ 379,074	$ 367,445
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual		0.1073	0.114
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum		$ 211,966	$ 193,468
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum		0.06	0.06
Banking Regulation, Tier 1 Risk-Based Capital, Well Capitalized, Minimum	[1]	$ 282,621	$ 257,957
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Well Capitalized, Minimum	[1]	0.08	0.08
Banking Regulation, Total Capital, Actual		$ 423,265	$ 403,501
Banking Regulation, Total Risk-Based Capital Ratio, Actual		0.1198	0.1251
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum		$ 282,621	$ 257,957
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum		0.08	0.08
Banking Regulation, Total Risk-Based Capital, Well Capitalized, Minimum	[1]	$ 353,276	$ 322,446
Banking Regulation, Total Risk-Based Capital Ratio, Well Capitalized, Minimum	[1]	0.10	0.10
Banking Regulation, Tier 1 Leverage Capital, Actual		$ 379,074	$ 367,445
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual		0.089	0.0992
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum		$ 170,336	$ 148,186
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum		0.04	0.04
Banking Regulation, Tier 1 Leverage Capital, Well Capitalized, Minimum	[1]	$ 212,920	$ 185,232
Banking Regulation, Tier 1 Leverage Capital Ratio, Well Capitalized, Minimum	[1]	0.05	0.05
Subsidiaries [Member]
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Actual	[1]	$ 394,381	$ 382,578
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Actual	[1]	0.1112	0.1182
Banking Regulation, Common Equity Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	[1]	$ 159,542	$ 145,605
Banking Regulation, Common Equity Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	[1]	0.045	0.045
Banking Regulation, Tier 1 Risk-Based Capital, Actual	[1]	$ 403,422	$ 391,534
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Actual	[1]	0.1138	0.121
Banking Regulation, Tier 1 Risk-Based Capital, Capital Adequacy, Minimum	[1]	$ 212,722	$ 194,139
Banking Regulation, Tier 1 Risk-Based Capital Ratio, Capital Adequacy, Minimum	[1]	0.06	0.06
Banking Regulation, Total Capital, Actual	[1]	$ 497,768	$ 477,590
Banking Regulation, Total Risk-Based Capital Ratio, Actual	[1]	0.1404	0.1476
Banking Regulation, Total Risk-Based Capital, Capital Adequacy, Minimum	[1]	$ 283,629	$ 258,853
Banking Regulation, Total Risk-Based Capital Ratio, Capital Adequacy, Minimum	[1]	0.08	0.08
Banking Regulation, Tier 1 Leverage Capital, Actual	[1]	$ 403,422	$ 391,534
Banking Regulation, Tier 1 Leverage Capital Ratio, Actual	[1]	0.093	0.1057
Banking Regulation, Tier 1 Leverage Capital, Capital Adequacy, Minimum	[1]	$ 173,498	$ 148,111
Banking Regulation, Tier 1 Leverage Capital Ratio, Capital Adequacy, Minimum	[1]	0.04	0.04

[1] Minimum to be Well Capitalized Under Prompt Corrective Action” is not formally defined under applicable banking regulations for bank holding companies.