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Loans - Loan Balances (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Total Loans	$ 2,057,502,000	$ 1,708,970,000
Allowance for loan losses	(25,028,000)	(14,767,000)
Net loans	2,032,474,000	1,694,203,000
Commercial and Agriculture [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	409,876,000	203,110,000
Commercial Real Estate Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	278,413,000	245,606,000
Commercial Real Estate Non Owner Occupied [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	705,072,000	592,222,000
Residential Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	442,588,000	463,032,000
Real Estate Construction [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	175,609,000	155,825,000
Farm Real Estate [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	33,102,000	34,114,000
Consumer and Other [Member]
Accounts Notes And Loans Receivable [Line Items]
Total Loans	$ 12,842,000	$ 15,061,000

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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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 after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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