Fair Value Measurements and Fair Values of Financial Instruments - Schedule of Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Financial liabilities:
Interest-bearing deposits	$ 1,156,203	$ 1,135,740
Noninterest-bearing deposits	277,392	277,012
Accrued interest payable	1,539	1,644
Carrying Amount [Member]
Financial assets:
Cash and cash equivalents	20,144	48,540
Restricted investment in bank stocks, at cost	4,690	5,412
Loans, net	1,195,923	1,167,622
Accrued interest receivable	5,567	5,063
Mortgage servicing rights	1,372	1,490
Financial liabilities:
Interest-bearing deposits	1,156,203	1,135,740
Noninterest-bearing deposits	277,392	277,012
Short-term borrowings	24,296	12,455
Long-term borrowings		40,584
Accrued interest payable	1,539	1,644
Fair Value [Member]
Financial assets:
Cash and cash equivalents	20,144	48,540
Restricted investment in bank stocks, at cost	4,690	5,412
Loans, net	1,164,853	1,110,730
Accrued interest receivable	5,567	5,063
Mortgage servicing rights	2,031	2,074
Financial liabilities:
Interest-bearing deposits	1,154,604	1,134,312
Noninterest-bearing deposits	277,392	277,012
Short-term borrowings	24,296	12,455
Long-term borrowings		40,536
Accrued interest payable	1,539	1,644
Level I [Member]
Financial assets:
Cash and cash equivalents	20,144	48,540
Restricted investment in bank stocks, at cost
Loans, net
Accrued interest receivable
Mortgage servicing rights
Financial liabilities:
Interest-bearing deposits
Noninterest-bearing deposits
Short-term borrowings
Long-term borrowings
Accrued interest payable
Level II [Member]
Financial assets:
Cash and cash equivalents
Restricted investment in bank stocks, at cost	4,690	5,412
Loans, net
Accrued interest receivable	5,567	5,063
Mortgage servicing rights
Financial liabilities:
Interest-bearing deposits	765,756	758,406
Noninterest-bearing deposits	277,392	277,012
Short-term borrowings	24,296	12,455
Long-term borrowings
Accrued interest payable	1,539	1,644
Level III [Member]
Financial assets:
Cash and cash equivalents
Restricted investment in bank stocks, at cost
Loans, net	1,164,853	1,110,730
Mortgage servicing rights	2,031	2,074
Financial liabilities:
Interest-bearing deposits	388,848	375,906
Noninterest-bearing deposits
Short-term borrowings
Long-term borrowings		40,536
Accrued interest payable

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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