Regulatory Matters - Reconciliation of the Company's and Bank's stockholders' equity to total regulatory (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total stockholders' equity per financial statements	$ 125,969	$ 116,499	$ 109,882
Adjustments to Tier 1 and Common Equity Tier 1 capital:
Accumulated other comprehensive loss	6,635	3,791
Goodwill disallowed	(2,235)	(1,410)	(1,410)
Core deposit intangible	(433)	(199)
Total Tier 1 and Common Equity Tier 1 capital	129,936	118,681
Adjustments to total capital:
Allowance for loan losses	7,559	11,633	$ 5,954
Overfunding of the allowance		(746)
Total regulatory capital	137,495	129,568
Subsidiaries [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Total stockholders' equity per financial statements	118,691	108,535
Adjustments to Tier 1 and Common Equity Tier 1 capital:
Accumulated other comprehensive loss	6,635	3,791
Goodwill disallowed	(2,235)	(1,410)
Core deposit intangible	(433)	(199)
Total Tier 1 and Common Equity Tier 1 capital	122,658	110,717
Adjustments to total capital:
Allowance for loan losses	7,559	11,633
Overfunding of the allowance		(746)
Total regulatory capital	130,217	121,604
Rhinebeck Bank
Adjustments to total capital:
Total regulatory capital	$ 130,217	$ 121,604