LOANS AND RELATED ALLOWANCE FOR CREDIT LOSSES - Activity in Allowance (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
Jan. 01, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 25,333	$ 37,814	$ 24,734	$ 25,333	$ 23,936
Provision for credit losses		983	386	5,004	(53)
PCD allowance established in acquisition				1,247
Charge-offs		(412)	(222)	(733)	(515)
Recoveries		478	162	1,029	1,692
Ending balance		38,863	25,060	38,863	25,060
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
PCD allowance established in acquisition	200
Ending balance	6,983	6,983		6,983
Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	3,279	3,735	2,981	3,279	2,440
Provision for credit losses		515	14	1,693	(189)
PCD allowance established in acquisition				69
Charge-offs		(15)	(17)	(15)	(22)
Recoveries		14	6	45	755
Ending balance		4,249	2,984	4,249	2,984
Commercial and industrial \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	(822)	(822)		(822)
Commercial real estate - owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,193	2,362	1,224	1,193	1,840
Provision for credit losses		(108)	(65)	336	(781)
PCD allowance established in acquisition				127
Charge-offs		(2)	0	(5)	0
Recoveries		2	1	16	101
Ending balance		2,254	1,160	2,254	1,160
Commercial real estate - owner occupied \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	587	587		587
Commercial real estate - non-owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	6,721	7,538	6,611	6,721	8,145
Provision for credit losses		248	268	87	(1,536)
PCD allowance established in acquisition				239
Charge-offs		(171)	0	(171)	0
Recoveries		15	3	253	273
Ending balance		7,630	6,882	7,630	6,882
Commercial real estate - non-owner occupied \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	501	501		501
Construction and land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	4,223	5,834	4,059	4,223	4,914
Provision for credit losses		1,004	316	398	(539)
PCD allowance established in acquisition				240
Charge-offs		0	0	0	0
Recoveries		44	1	52	1
Ending balance		6,882	4,376	6,882	4,376
Construction and land development \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	1,969	1,969		1,969
Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,472	2,603	1,375	1,472	1,263
Provision for credit losses		(348)	(52)	630	60
PCD allowance established in acquisition				68
Charge-offs		0	0	0	0
Recoveries		280	0	280	0
Ending balance		2,535	1,323	2,535	1,323
Multi-family \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	85	85		85
One-to-four family residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1,759	4,077	1,696	1,759	1,311
Provision for credit losses		(21)	(78)	939	93
PCD allowance established in acquisition				492
Charge-offs		(8)	(18)	(34)	(67)
Recoveries		40	60	135	323
Ending balance		4,088	1,660	4,088	1,660
One-to-four family residential \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	797	797		797
Agricultural and farmland
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	796	2,607	924	796	845
Provision for credit losses		(337)	(83)	(100)	(4)
PCD allowance established in acquisition				5
Charge-offs		0	0	0	0
Recoveries		2	0	4	0
Ending balance		2,272	841	2,272	841
Agricultural and farmland \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	1,567	1,567		1,567
Municipal, consumer, and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	5,890	9,058	5,864	5,890	3,178
Provision for credit losses		30	66	1,021	2,843
PCD allowance established in acquisition				7
Charge-offs		(216)	(187)	(508)	(426)
Recoveries		81	91	244	239
Ending balance		8,953	$ 5,834	8,953	$ 5,834
Municipal, consumer, and other \| Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Ending balance	$ 2,299	$ 2,299		$ 2,299

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

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Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

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Amount, excluding accrued interest, of allowance for credit loss at acquisition date of financing receivable purchased with credit deterioration. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 19
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-19

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