The percentage of assets equal to the debt instrument.

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Amount of fair value adjustment to junior subordinated debenture owed to unconsolidated subsidiary trust.

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The maximum number of consecutive quarterly periods for deferral of distributions on trust preferred securities.

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Amount of funds accepted from public in form of deposit.

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Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Amount of the collateral pledged in support of federal home loan bank advances outstanding.

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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The cash inflow from the additional capital contribution to the entity.

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The cash inflow from issuance of preferred stocks by a business trust or other special purpose entity, mainly established by a bank holding entity, to third party investors. The trust's assets are deeply subordinated debentures of the bank holding entity. Most trust preferred securities are subject to a mandatory redemption upon the repayment of the debentures.

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Note 8 - Long-term Borrowings (Details Textual)	Apr. 07, 2006 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 01, 2011 USD ($)
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged		$ 1,100,000,000
Long-term Federal Home Loan Bank Advances, Total		0	$ 0
Public Deposit Accounts		316,400,000
Number of Consecutive Quarterly Periods for Deferral of Distributions on Trust Preferred Securities, Maximum	20
Proceeds from Issuance of Common Stock	$ 619,000
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total	20,600,000
MidCarolina Trusts [Member]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Total				$ 8,800,000
Equity Method Investments			264,000
AMNB Statutory Trust I [Member]
Equity Method Investments		619,000
MidCarolina Trust I [Member]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Fair Value Adjustment		596,000	610,000	1,200,000
MidCarolina Trust II [Member]
Junior Subordinated Debenture Owed to Unconsolidated Subsidiary Trust, Fair Value Adjustment		530,000	$ 541,000	$ 1,000,000.0
Private Placement [Member] \| Wholly-Owned Subsidiary, Unconsolidated [Member]
Proceeds from Issuance of Trust Preferred Securities	$ 20,000,000.0
US States and Political Subdivisions Debt Securities [Member]
Deposit Liabilities, Collateral Issued, Financial Instruments		$ 114,100,000
FHLB Line of Credit [Member]
Debt Instrument, Percentage of Assets		30.00%
Letters of Credit Outstanding, Amount		$ 270,000,000.0