LOANS HELD FOR INVESTMENT, Impaired Loan Information (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2020	Dec. 31, 2019
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	$ 14,065	$ 5,484
Recorded Investment With No Allowance	8,492	2,771
Recorded Investment With Allowance	5,154	1,396
Total Recorded Investment	13,646	4,167
Related Allowance	2,064	525
Average Recorded Investment	10,206	6,764
Minimum [Member]
Impaired Loan Information [Abstract]
Threshold balance of loan to be specifically reviewed for impairment	250
Commercial Real Estate [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	4,339	754
Recorded Investment With No Allowance	3,380	299
Recorded Investment With Allowance	959	0
Total Recorded Investment	4,339	299
Related Allowance	260	0
Average Recorded Investment	2,699	1,059
Commercial [Member] \| Specialized [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	0	573
Recorded Investment With No Allowance	0	573
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	573
Related Allowance	0	0
Average Recorded Investment	673	1,345
Commercial [Member] \| General [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	7,071	1,839
Recorded Investment With No Allowance	3,298	0
Recorded Investment With Allowance	3,773	1,396
Total Recorded Investment	7,071	1,396
Related Allowance	1,734	525
Average Recorded Investment	4,622	2,173
Consumer [Member] \| 1-4 Family [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	2,655	2,318
Recorded Investment With No Allowance	1,814	1,899
Recorded Investment With Allowance	422	0
Total Recorded Investment	2,236	1,899
Related Allowance	70	0
Average Recorded Investment	2,212	2,187
Consumer [Member] \| Auto Loans [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	0	0
Recorded Investment With No Allowance	0	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Consumer [Member] \| Other Consumer [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	0	0
Recorded Investment With No Allowance	0	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	0	0
Construction [Member]
Impaired Loan Information [Abstract]
Unpaid Contractual Principal Balance	0	0
Recorded Investment With No Allowance	0	0
Recorded Investment With Allowance	0	0
Total Recorded Investment	0	0
Related Allowance	0	0
Average Recorded Investment	$ 0	$ 0

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The amount of threshold balance of loan to be specifically reviewed for impairment.

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5212-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5258-111524

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Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524

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