Fair Value Measurements (Details) - Rhinebeck Bank 401(k) Plan - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Fair Value Measurements
Investments at fair value	$ 30,723,635	$ 25,627,515
Unfunded commitments	0
Level 1
Fair Value Measurements
Investments at fair value	30,723,635	25,627,515
Level 1 \| Mutual funds
Fair Value Measurements
Investments at fair value	8,805,663	7,852,556
Level 1 \| Pooled separate accounts
Fair Value Measurements
Investments at fair value	793,963	681,055
Level 1 \| Collective trust funds
Fair Value Measurements
Investments at fair value	20,147,722	16,274,832
Level 1 \| Employer security
Fair Value Measurements
Investments at fair value	$ 976,287	$ 819,072

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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