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Investment Securities - Additional information (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022 USD ($) position	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) position	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
INVESTMENT SECURITIES
Gross investment losses	$ 5,000		$ 5,000
Investment Securities:
Proceeds from sales of investment securities - available for sale	1,500,000	$ 0	1,519,000	$ 960,000
Gross investment gains	5,000		5,000	$ 84,000
Gross investment losses	5,000		5,000
Book value of securities available for sale and held to maturity	$ 129,517,000		$ 129,517,000		$ 122,574,000
Number of positions | position	423		423
Premium percentage on mortgage backed securities purchased			100.90%
Consolidated investment securities portfolio modified, years			58 months 6 days		41 months 15 days
Standard & Poor's, AAA Rating
INVESTMENT SECURITIES
Portfolio rated	52.90%		52.90%		47.10%
Securities rated below A
INVESTMENT SECURITIES
Portfolio rated	13.90%		13.90%		14.70%
Maximum
Investment Securities:
Consolidated investment securities portfolio modified, years			60 months

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