Regulatory Matters (Schedule of actual capital amounts and ratios) (Details) - Rhinebeck Bank $ in Thousands	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total capital (to risk-weighted assets) Actual Amount	$ 146,906	$ 144,675
Total capital (to risk-weighted assets) Actual Ratio	0.1329	0.1270
Total capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 88,406	$ 91,154
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	$ 110,508	$ 113,942
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	$ 139,078	$ 136,295
Tier 1 capital (to risk-weighted assets) Actual Ratio	0.1259	0.1196
Tier 1 capital (to risk-weighted assets) For Capital Adequacy Purposes Amount	$ 66,305	$ 68,365
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	$ 88,406	$ 91,154
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	$ 139,078	$ 136,295
Common equity tier one capital (to risk weighted assets) Actual Ratio	0.1259	0.1196
Common equity tier one capital (to risk weighted assets) For Capital Adequacy Purposes Amount	$ 49,729	$ 51,274
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	$ 71,830	$ 74,062
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	$ 139,078	$ 136,295
Tier 1 capital (to average assets) Actual Ratio	0.1060	0.1010
Tier 1 capital (to average assets) For Capital Adequacy Purposes Amount	$ 52,498	$ 53,990
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	$ 65,622	$ 67,488
Tier 1 capital (to average assets) To be Well Capitalized under Prompt Corrective Action Provisions Ratio	0.0500	0.0500