Regulatory Matters (Schedule of actual capital amounts and ratios) (Details) - Rhinebeck Bank $ in Thousands	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets) Actual Amount	$ 141,259	$ 139,257
Total capital (to risk-weighted assets) Actual Ratio	0.1216	0.1225
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 92,932	$ 90,980
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	0.0800	0.0800
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 116,165	$ 113,725
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.1000	0.1000
Tier 1 capital (to risk-weighted assets) Actual Amount	$ 131,914	$ 131,314
Tier 1 capital (to risk-weighted assets) Actual Ratio	0.1136	0.1155
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 69,699	$ 68,235
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	0.0600	0.0600
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 92,932	$ 90,980
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0800	0.0800
Common equity tier one capital (to risk weighted assets) Actual Amount	$ 131,914	$ 131,314
Common equity tier one capital (to risk weighted assets) Actual Ratio	0.1136	0.1155
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Amount	$ 52,274	$ 51,176
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Ratio	0.0450	0.0450
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 75,508	$ 73,921
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0650	0.0650
Tier 1 capital (to average assets) Actual Amount	$ 131,914	$ 131,314
Tier 1 capital (to average assets) Actual Ratio	0.0968	0.0975
Tier 1 capital (to average assets) For Capital Adequacy Purposes Amount	$ 54,525	$ 53,868
Tier 1 capital (to average assets) For Capital Adequacy Purposes Ratio	0.0400	0.0400
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 68,156	$ 67,335
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0500	0.0500