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Nature of Operations - Additional Information (Details) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	Jan. 20, 2021 USD ($) $ / shares shares	Sep. 30, 2021 shares	Sep. 30, 2020 shares	Sep. 30, 2021 shares	Sep. 30, 2020 shares
Basis Of Presentation [Line Items]
Sale of stock, gross proceeds	$ 37.1
Sale of stock, number of common stock issued | shares	3,701,509
Sale of stock, price per share | $ / shares	$ 10.00
Cash contributions to Employee Stock Ownership Plan ("ESOP")	$ 3.0
Employee stock ownership plan per share | $ / shares	$ 10.00
Offering expenses	$ 1.7
Amount invested in bank operations	$ 16.3
Common stock exchange ratio	0.90686
Options to purchase shares excluded from calculation of diluted earnings per common share | shares		0	90,441	0	90,441
Community First Bancshares, MHC
Basis Of Presentation [Line Items]
Common stock ownership percentage	54.00%		54.00%		54.00%

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Amount invested in bank operations.

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Basis of presentation.

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Common stock exchange ratio.

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Employee stock ownership plan Esop per share.

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Offering expenses.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
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This item represents the amount of cash contributions during the period made by the entity to the Employee Stock Ownership Plan (ESOP).

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-Publisher FASB
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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Amount of consideration received by subsidiary or equity investee in exchange for shares of stock issued or sold. Includes amount of cash received, fair value of noncash assets received, and fair value of liabilities assumed by the investor.

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