Note 3 - Loans and Allowance for Credit Losses - Loan Vintage (Details) - USD ($)		Sep. 30, 2022	Dec. 31, 2021
Financing Receivable, Year One, Originated, Current Fiscal Year		$ 1,065,527,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,146,370,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		585,845,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		166,360,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		83,598,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		136,816,000
Financing Receivable, Term Loan		3,184,516,000
Financing Receivable, Revolving		696,442,000
Loans		3,880,958,000	$ 3,453,459,000
Commercial Portfolio Segment [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		803,573,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		900,010,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		489,079,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		152,537,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		67,990,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		90,465,000
Financing Receivable, Term Loan		2,503,654,000
Financing Receivable, Revolving		641,409,000
Loans		3,145,063,000	2,950,424,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		232,752,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		219,447,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		83,487,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		21,495,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		4,743,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		10,587,000
Financing Receivable, Term Loan		572,511,000
Financing Receivable, Revolving		641,119,000
Loans	[1]	1,213,630,000	1,137,419,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		84,723,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		172,209,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		49,083,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		12,173,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		2,826,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		10,313,000
Financing Receivable, Term Loan		331,327,000
Financing Receivable, Revolving		409,355,000
Loans	[2]	740,682,000	729,224,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		144,180,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		46,989,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		34,404,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		9,322,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		1,866,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		238,000
Financing Receivable, Term Loan		236,999,000
Financing Receivable, Revolving		218,802,000
Loans		455,801,000	398,378,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		3,849,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		249,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		51,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		36,000
Financing Receivable, Term Loan		4,185,000
Financing Receivable, Revolving		12,962,000
Loans		17,147,000	9,817,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		34,993,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		20,475,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3,990,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		52,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		16,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,154,000
Financing Receivable, Term Loan		60,680,000
Financing Receivable, Revolving		290,000
Loans		60,970,000	43,239,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		26,719,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		11,956,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3,432,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		343,000
Financing Receivable, Term Loan		42,450,000
Financing Receivable, Revolving		288,000
Loans		42,738,000	28,390,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		8,274,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		8,519,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		558,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		52,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		718,000
Financing Receivable, Term Loan		18,121,000
Financing Receivable, Revolving		2,000
Loans		18,123,000	14,730,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		16,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		93,000
Financing Receivable, Term Loan		109,000
Financing Receivable, Revolving		0
Loans		109,000	119,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		252,513,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		220,266,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		95,172,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		31,000,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		32,641,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		11,985,000
Financing Receivable, Term Loan		643,577,000
Financing Receivable, Revolving		0
Loans		643,577,000	565,758,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		129,640,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		159,735,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		58,119,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		19,107,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		9,589,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		9,414,000
Financing Receivable, Term Loan		385,604,000
Financing Receivable, Revolving		0
Loans		385,604,000	346,082,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		120,184,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		60,281,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		37,008,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		11,893,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		22,890,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		2,571,000
Financing Receivable, Term Loan		254,827,000
Financing Receivable, Revolving		0
Loans		254,827,000	208,060,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		2,689,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		250,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		45,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		162,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		3,146,000
Financing Receivable, Revolving		0
Loans		3,146,000	11,616,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		213,685,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		356,302,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		255,470,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		91,354,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		24,392,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		61,435,000
Financing Receivable, Term Loan		1,002,638,000
Financing Receivable, Revolving		0
Loans		1,002,638,000	1,027,415,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		88,916,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		182,620,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		132,805,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		68,453,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		10,300,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		16,233,000
Financing Receivable, Term Loan		499,327,000
Financing Receivable, Revolving		0
Loans		499,327,000	503,482,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		117,989,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		167,936,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		122,665,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		22,901,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		14,092,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		45,202,000
Financing Receivable, Term Loan		490,785,000
Financing Receivable, Revolving		0
Loans		490,785,000	511,280,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		6,780,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		5,746,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		12,526,000
Financing Receivable, Revolving		0
Loans		12,526,000	12,653,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		69,630,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		83,520,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		50,960,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		8,636,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		6,198,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		5,304,000
Financing Receivable, Term Loan		224,248,000
Financing Receivable, Revolving		0
Loans		224,248,000	176,593,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 1-4 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		31,627,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		56,824,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		37,519,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		5,387,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		3,067,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		4,270,000
Financing Receivable, Term Loan		138,694,000
Financing Receivable, Revolving		0
Loans		138,694,000	119,473,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 5-7 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		38,003,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		26,696,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		13,441,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		3,249,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		3,131,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		982,000
Financing Receivable, Term Loan		85,502,000
Financing Receivable, Revolving		0
Loans		85,502,000	56,968,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] | Grades 8-9 [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		52,000
Financing Receivable, Term Loan		52,000
Financing Receivable, Revolving		0
Loans		52,000	152,000
Retail Portfolio Segment [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		261,954,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		246,360,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		96,766,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		13,823,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		15,608,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		46,351,000
Financing Receivable, Term Loan		680,862,000
Financing Receivable, Revolving		55,033,000
Loans		735,895,000	503,035,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		258,144,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		243,109,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		95,502,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		12,576,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		15,111,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		45,802,000
Financing Receivable, Term Loan		670,244,000
Financing Receivable, Revolving		35,197,000
Loans		705,441,000	442,547,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Performing Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		258,124,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		243,023,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		95,502,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		12,576,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		15,111,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		44,741,000
Financing Receivable, Term Loan		669,077,000
Financing Receivable, Revolving		35,197,000
Loans		704,274,000	440,861,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		20,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		86,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,061,000
Financing Receivable, Term Loan		1,167,000
Financing Receivable, Revolving		0
Loans		1,167,000	1,686,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		3,810,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		3,251,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,264,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,247,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		497,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		549,000
Financing Receivable, Term Loan		10,618,000
Financing Receivable, Revolving		19,836,000
Loans	[3]	30,454,000	60,488,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Performing Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		3,810,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		3,251,000
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		1,264,000
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		1,247,000
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		497,000
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		549,000
Financing Receivable, Term Loan		10,618,000
Financing Receivable, Revolving		19,836,000
Loans		30,454,000	60,369,000
Retail Portfolio Segment [Member] | Other Consumer Loans [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Year One, Originated, Current Fiscal Year		0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, Term Loan		0
Financing Receivable, Revolving		0
Loans		$ 0	$ 119,000

[1] For September 30, 2022, and December 31, 2021, includes $2.6 million and $40.1 million in loans originated under the Paycheck Protection Program, respectively.

[2] Included in Commercial and Industrial Loans Grades 1 – 4 are $40.1 million of loans originated under the Paycheck Protection Program.

[3] In conjunction with the adoption of the CECL methodology effective January 1, 2022, home equity lines of credit were reclassified to 1-4 family mortgage loans from other consumer loans. Home equity lines of credit totaled $35.6 million and $29.5 million as of September 30, 2022 and December 31, 2021, respectively.