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Investment Securities - Additional information (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2022 USD ($) position	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)
Investment Securities:
Proceeds from sales of investment securities - available for sale	$ 0	$ 0
Book value of securities available for sale and held to maturity	$ 120,771,000		$ 122,574,000
Number of positions | position	245
Premium percentage on mortgage backed securities purchased	101.00%
Consolidated investment securities portfolio modified, years	50 months 15 days		41 months 15 days
Standard & Poor's, AAA Rating
INVESTMENT SECURITIES
Portfolio rated	49.40%		47.10%
Securities rated below A
INVESTMENT SECURITIES
Portfolio rated	14.10%		14.70%
Maximum
Investment Securities:
Consolidated investment securities portfolio modified, years	60 months

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Investment securities.

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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