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Note 4 - Loans (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Bank Overdrafts	$ 1,130	$ 2,200
Deferred Loan Fees	5,580	4,600
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Ending Balance	5,655	14,464	$ 17,229	$ 22,853
Highlands Bankshares, Inc. [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Ending Balance		8,150
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value		53,120
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, Contractually Required Payments Receivable at Acquisition		$ 76,450
SBA CARES Act Paycheck Protection Program [Member]
Financing Receivable, Deferred Payments, Forgiven Amount	$ 3,940
Financing Receivable, Percentage of Loans Forgiven from Total Loans with Deferred Payments	6.46%
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | SBA CARES Act Paycheck Protection Program [Member]
Loans and Leases Receivable, Gross, Total	$ 57,060
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total	2,300
Amortization of Deferred Loan Origination Fees, Net	$ 868

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- Definition

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Amount forgiven of the deferred amounts on loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

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The percentage of loans forgiven from the total deferred loans receivable related to loan modification programs offered to financial institution customers affected by COVID-19.

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The net increase(decrease) in interest income during the period representing the allocation of deferred loan origination fees less deferred loan origination costs using the effective interest method over the term of the debt arrangement to which they pertain taking into account the effect of prepayments.

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Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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Fair value at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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Amount of contractually required payments receivable at acquisition of acquired loans not accounted for as debt securities with evidence of deterioration of credit quality.

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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.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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