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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Troubled debt restructurings (TDRs) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) contract	Dec. 31, 2021 USD ($) contract
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	38	64
TDR loans, Balance | $	$ 2,986	$ 3,851
Construction and land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract		1
TDR loans, Balance | $		$ 15
One- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	15	22
TDR loans, Balance | $	$ 1,108	$ 1,638
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	2	2
TDR loans, Balance | $	$ 1,609	$ 1,811
Consumer.
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	21	39
TDR loans, Balance | $	$ 269	$ 387
Accruing
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	26	38
TDR loans, Balance | $	$ 1,225	$ 1,002
Accruing | Construction and land development
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract		1
TDR loans, Balance | $		$ 15
Accruing | One- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	12	10
TDR loans, Balance | $	$ 1,005	$ 579
Accruing | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract		1
TDR loans, Balance | $		$ 85
Accruing | Consumer.
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	14	26
TDR loans, Balance | $	$ 220	$ 323
Non-accruing
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	12	26
TDR loans, Balance | $	$ 1,761	$ 2,849
Non-accruing | One- to four-family residential
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	3	12
TDR loans, Balance | $	$ 103	$ 1,059
Non-accruing | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	2	1
TDR loans, Balance | $	$ 1,609	$ 1,726
Non-accruing | Consumer.
LOANS AND ALLOWANCE FOR CREDIT LOSSES
TDR Loans, Number | contract	7	13
TDR loans, Balance | $	$ 49	$ 64

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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Amount of financing receivable modified as troubled debt restructuring.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI https://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554

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