Regulatory Matters (Schedule of actual capital amounts and ratios) (Details) - Rhinebeck Bank $ in Thousands	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets) Actual Amount	$ 142,130	$ 135,450
Total capital (to risk-weighted assets) Actual Ratio	0.1345	0.1263
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 84,510	$ 85,821
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	0.08	0.08
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 105,638	$ 107,276
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.10	0.10
Tier 1 capital (to risk-weighted assets) Actual Amount	$ 133,697	$ 126,668
Tier 1 capital (to risk-weighted assets) Actual Ratio	0.1266	0.1181
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 63,383	$ 64,366
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	0.06	0.06
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 84,510	$ 85,821
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.08	0.08
Common equity tier one capital (to risk weighted assets) Actual Amount	$ 133,697	$ 126,668
Common equity tier one capital (to risk weighted assets) Actual Ratio	0.1266	0.1181
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Amount	$ 47,537	$ 48,274
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Ratio	0.045	0.045
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 68,665	$ 69,729
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.065	0.065
Tier 1 capital (to average assets) Actual Amount	$ 133,697	$ 126,668
Tier 1 capital (to average assets) Actual Ratio	0.1064	0.1007
Tier 1 capital (to average assets) For Capital Adequacy Purposes Amount	$ 50,266	$ 50,292
Tier 1 capital (to average assets) For Capital Adequacy Purposes Ratio	0.04	0.04
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 62,833	$ 62,865
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.05	0.05