Regulatory Matters (Schedule of actual capital amounts and ratios) (Details) - Rhinebeck Bank $ in Thousands	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets) Actual Amount	$ 132,876	$ 130,217
Total capital (to risk-weighted assets) Actual Ratio	13.47	13.54
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 78,904	$ 76,917
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	8.00	8.00
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 98,630	$ 96,146
Total capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	10.00	10.00
Tier 1 capital (to risk-weighted assets) Actual Amount	$ 125,176	$ 122,658
Tier 1 capital (to risk-weighted assets) Actual Ratio	12.69	12.76
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 59,178	$ 57,687
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Ratio	6.00	6.00
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 78,904	$ 76,917
Tier 1 capital (to risk-weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	8.00	8.00
Common equity tier one capital (to risk weighted assets) Actual Amount	$ 125,176	$ 122,658
Common equity tier one capital (to risk weighted assets) Actual Ratio	12.69	12.76
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Amount	$ 44,384	$ 43,266
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Ratio	4.50%	4.50%
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 64,110	$ 62,495
Common equity tier one capital (to risk weighted assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to average assets) Actual Amount	$ 125,176	$ 122,658
Tier 1 capital (to average assets) Actual Ratio	9.75	9.65
Tier 1 capital (to average assets) For Capital Adequacy Purposes Amount	$ 51,355	$ 50,865
Tier 1 capital (to average assets) For Capital Adequacy Purposes Ratio	4.00	4.00
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Amount	$ 64,194	$ 63,582
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	5.00	5.00