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LOANS AND ALLOWANCE FOR LOAN LOSSES - Troubled Debt Restructuring (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) contract	Dec. 31, 2017 USD ($) contract
Financing Receivable, Modifications [Line Items]
Total	$ 1,196	$ 657
Specific reserves on TDRs	$ 0	$ 17
Troubled Debt Restructurings:
Number of Contracts | contract	4	3
Pre-Modification Outstanding Recorded Investment	$ 582	$ 392
Post-Modification Outstanding Recorded Investment	$ 582	$ 375
Commercial and industrial
Troubled Debt Restructurings:
Number of Contracts | contract		2
Pre-Modification Outstanding Recorded Investment		$ 381
Post-Modification Outstanding Recorded Investment		$ 364
1-4 family residential
Troubled Debt Restructurings:
Number of Contracts | contract	3	1
Pre-Modification Outstanding Recorded Investment	$ 504	$ 11
Post-Modification Outstanding Recorded Investment	$ 504	11
Agricultural
Troubled Debt Restructurings:
Number of Contracts | contract	1
Pre-Modification Outstanding Recorded Investment	$ 78
Post-Modification Outstanding Recorded Investment	78
Nonaccrual TDRs
Financing Receivable, Modifications [Line Items]
Total	335	0
Performing TDRs
Financing Receivable, Modifications [Line Items]
Total	$ 861	$ 657

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Troubled Debt Restructuring [Abstract]

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Amount of allowance for credit losses related to receivables which had been measured under a general allowance for credit losses methodology that are now identified as troubled debt restructurings.

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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-Section 50
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Post-modification amount of investment in financing receivables modified by troubled debt restructurings.

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Pre-modification amount of investment in financing receivables modified by troubled debt restructurings.

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