Note 3 - Loans and Allowance for Credit Losses - Loans by Credit Quality Indicators (Details) - USD ($)		Sep. 30, 2022	Dec. 31, 2021
Loans		$ 3,880,958,000	$ 3,453,459,000
Commercial Portfolio Segment [Member]
Loans		3,145,063,000	2,950,424,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[1]	1,213,630,000	1,137,419,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		60,970,000	43,239,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		643,577,000	565,758,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		1,002,638,000	1,027,415,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		224,248,000	176,593,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans	[2]	740,682,000	729,224,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		42,738,000	28,390,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		385,604,000	346,082,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		499,327,000	503,482,000
Grades 1-4 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		138,694,000	119,473,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans		455,801,000	398,378,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		18,123,000	14,730,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		254,827,000	208,060,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		490,785,000	511,280,000
Grades 5-7 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		85,502,000	56,968,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans		17,147,000	9,817,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Loans		109,000	119,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Loans		3,146,000	11,616,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Loans		12,526,000	12,653,000
Grades 8-9 [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Loans		$ 52,000	$ 152,000

[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.