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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loans Classified by Aging Analysis (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Financial Asset, 30 to 59 Days Past Due | Consumer auto
Financing Receivables, By Class	$ 99	$ 229
Financial Asset, 30 to 59 Days Past Due | Land development
Financing Receivables, By Class	2	29
Financial Asset, 30 to 59 Days Past Due | Owner occupied one- to four-family residential
Financing Receivables, By Class	144	843
Financial Asset, 30 to 59 Days Past Due | Commercial business
Financing Receivables, By Class		1,404
Financial Asset, 30 to 59 Days Past Due | Consumer
Financing Receivables, By Class	224	126
Financial Asset, 30 to 59 Days Past Due | Loans Receivable, Gross
Financing Receivables, By Class	469	2,631
Financial Asset, 60 to 89 Days Past Due | Consumer auto
Financing Receivables, By Class	24	31
Financial Asset, 60 to 89 Days Past Due | Land development
Financing Receivables, By Class		15
Financial Asset, 60 to 89 Days Past Due | Owner occupied one- to four-family residential
Financing Receivables, By Class	229	2
Financial Asset, 60 to 89 Days Past Due | Consumer
Financing Receivables, By Class	111	28
Financial Asset, 60 to 89 Days Past Due | Loans Receivable, Gross
Financing Receivables, By Class	364	76
Financial Asset, Equal to or Greater than 90 Days Past Due | Commercial Real Estate
Financing Receivables, By Class	1,832	2,006
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer auto
Financing Receivables, By Class	15	34
Financial Asset, Equal to or Greater than 90 Days Past Due | Home Equity Line of Credit
Financing Receivables, By Class	314	636
Financial Asset, Equal to or Greater than 90 Days Past Due | Land development
Financing Receivables, By Class	468	468
Financial Asset, Equal to or Greater than 90 Days Past Due | Owner occupied one- to four-family residential
Financing Receivables, By Class	1,502	2,216
Financial Asset, Equal to or Greater than 90 Days Past Due | Consumer
Financing Receivables, By Class	89	63
Financial Asset, Equal to or Greater than 90 Days Past Due | Loans Receivable, Gross
Financing Receivables, By Class	4,220	5,423
Financing Receivables Past Due | Commercial Real Estate
Financing Receivables, By Class	1,832	2,006
Financing Receivables Past Due | Consumer auto
Financing Receivables, By Class	138	294
Financing Receivables Past Due | Home Equity Line of Credit
Financing Receivables, By Class	314	636
Financing Receivables Past Due | Land development
Financing Receivables, By Class	470	512
Financing Receivables Past Due | Owner occupied one- to four-family residential
Financing Receivables, By Class	1,875	3,061
Financing Receivables Past Due | Commercial business
Financing Receivables, By Class		1,404
Financing Receivables Past Due | Consumer
Financing Receivables, By Class	424	217
Financing Receivables Past Due | Loans Receivable, Gross
Financing Receivables, By Class	5,053	8,130
Financing Receivables Current | Commercial construction
Financing Receivables, By Class	453,183	617,505
Financing Receivables Current | Commercial Real Estate
Financing Receivables, By Class	1,621,283	1,474,224
Financing Receivables Current | Industrial revenue bonds
Financing Receivables, By Class	13,140	14,203
Financing Receivables Current | Consumer auto
Financing Receivables, By Class	42,485	48,621
Financing Receivables Current | Home Equity Line of Credit
Financing Receivables, By Class	120,627	119,329
Financing Receivables Current | Land development
Financing Receivables, By Class	43,481	47,315
Financing Receivables Current | One- to four-family residential construction
Financing Receivables, By Class	24,582	28,302
Financing Receivables Current | Subdivision construction
Financing Receivables, By Class	28,309	26,694
Financing Receivables Current | Owner occupied one- to four-family residential
Financing Receivables, By Class	710,579	558,897
Financing Receivables Current | Non-owner occupied one- to four-family residential
Financing Receivables, By Class	121,405	119,635
Financing Receivables Current | Other residential
Financing Receivables, By Class	918,009	697,903
Financing Receivables Current | Commercial business
Financing Receivables, By Class	295,266	279,109
Financing Receivables Current | Consumer
Financing Receivables, By Class	35,512	37,685
Financing Receivables Current | Loans Receivable, Gross
Financing Receivables, By Class	4,427,861	4,069,422
Financing Receivables Total | Commercial construction
Financing Receivables, By Class	453,183	617,505
Financing Receivables Total | Commercial Real Estate
Financing Receivables, By Class	1,623,115	1,476,230
Financing Receivables Total | Industrial revenue bonds
Financing Receivables, By Class	13,140	14,203
Financing Receivables Total | Consumer auto
Financing Receivables, By Class	42,623	48,915
Financing Receivables Total | Home Equity Line of Credit
Financing Receivables, By Class	120,941	119,965
Financing Receivables Total | Land development
Financing Receivables, By Class	43,951	47,827
Financing Receivables Total | One- to four-family residential construction
Financing Receivables, By Class	24,582	28,302
Financing Receivables Total | Subdivision construction
Financing Receivables, By Class	28,309	26,694
Financing Receivables Total | Owner occupied one- to four-family residential
Financing Receivables, By Class	712,454	561,958
Financing Receivables Total | Non-owner occupied one- to four-family residential
Financing Receivables, By Class	121,405	119,635
Financing Receivables Total | Other residential
Financing Receivables, By Class	918,009	697,903
Financing Receivables Total | Commercial business
Financing Receivables, By Class	295,266	280,513
Financing Receivables Total | Consumer
Financing Receivables, By Class	35,936	37,902
Financing Receivables Total | Loans Receivable, Gross
Financing Receivables, By Class	$ 4,432,914	$ 4,077,552

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