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Note 5 - Loans and Allowance for Loan Losses - Risk Category of Loans (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Total Loans	[1]	$ 2,755,153	$ 2,196,934
Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member]
Total Loans	[1]	183,569	96,020
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Total Loans	[1]	975,187	793,268
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member]
Total Loans	[1]	1,163,982	957,254
Commercial Portfolio Segment [Member] | Other Loans [Member]
Total Loans	[1]	317,891	274,586
Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member]
Total Loans	[1]	111,193	74,985
Other Financing Receivables [Member]
Total Loans	[1]	3,331	821
Pass [Member]
Total Loans		2,664,349	2,146,181
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member]
Total Loans		182,808	95,756
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Total Loans		913,868	767,603
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member]
Total Loans		1,158,935	955,327
Pass [Member] | Commercial Portfolio Segment [Member] | Other Loans [Member]
Total Loans		308,412	265,178
Pass [Member] | Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member]
Total Loans		97,010	61,496
Pass [Member] | Other Financing Receivables [Member]
Total Loans		3,316	821
Special Mention [Member]
Total Loans		8,250	9,620
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member]
Total Loans		0	0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Total Loans		5,980	5,353
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member]
Total Loans		2,083	0
Special Mention [Member] | Commercial Portfolio Segment [Member] | Other Loans [Member]
Total Loans		0	4,078
Special Mention [Member] | Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member]
Total Loans		187	189
Special Mention [Member] | Other Financing Receivables [Member]
Total Loans		0	0
Substandard [Member]
Total Loans		64,578	27,915
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member]
Total Loans		0	0
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Total Loans		52,728	18,115
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member]
Total Loans		217	593
Substandard [Member] | Commercial Portfolio Segment [Member] | Other Loans [Member]
Total Loans		7,354	5,330
Substandard [Member] | Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member]
Total Loans		4,279	3,877
Substandard [Member] | Other Financing Receivables [Member]
Total Loans		0	0
Impaired [Member]
Total Loans		17,976	13,218
Impaired [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member]
Total Loans		761	264
Impaired [Member] | Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]
Total Loans		2,611	2,197
Impaired [Member] | Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member]
Total Loans		2,747	1,334
Impaired [Member] | Commercial Portfolio Segment [Member] | Other Loans [Member]
Total Loans		2,125	0
Impaired [Member] | Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member]
Total Loans		9,717	9,423
Impaired [Member] | Other Financing Receivables [Member]
Total Loans		$ 15	$ 0
[1] Loans, net of deferred fees

X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=121593590&loc=d3e4428-111522

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