FAIR VALUE - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	$ 12,121	$ 11,506
Other real estate owned	0	316
Total assets	12,121	11,822
Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	12,121	11,506
Other real estate owned	0	316
Total assets	12,121	11,822
Other consumer loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	11
Other consumer loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0
Other consumer loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0
Other consumer loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	11
Commercial and Industrial Loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	9,500	9,059
Commercial and Industrial Loans | Working capital lines of credit loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	3,126	4,092
Commercial and Industrial Loans | Working capital lines of credit loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans | Working capital lines of credit loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans | Working capital lines of credit loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	3,126	4,092
Commercial and Industrial Loans | Non-working capital loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	6,374	4,967
Commercial and Industrial Loans | Non-working capital loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans | Non-working capital loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans | Non-working capital loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	6,374	4,967
Commercial Real Estate and Multi-family Residential Loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	1,492	1,817
Commercial Real Estate and Multi-family Residential Loans | Construction and land development loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	43	148
Commercial Real Estate and Multi-family Residential Loans | Construction and land development loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans | Construction and land development loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans | Construction and land development loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	43	148
Commercial Real Estate and Multi-family Residential Loans | Owner occupied loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	1,449	1,669
Commercial Real Estate and Multi-family Residential Loans | Owner occupied loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans | Owner occupied loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans | Owner occupied loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	1,449	1,669
Consumer 1-4 Family Mortgage Loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	1,061	553
Consumer 1-4 Family Mortgage Loans | Closed end first mortgage loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	474	553
Consumer 1-4 Family Mortgage Loans | Closed end first mortgage loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans | Closed end first mortgage loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans | Closed end first mortgage loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	474	553
Consumer 1-4 Family Mortgage Loans | Open end and junior lien loans
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	587
Consumer 1-4 Family Mortgage Loans | Open end and junior lien loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0
Consumer 1-4 Family Mortgage Loans | Open end and junior lien loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0
Consumer 1-4 Family Mortgage Loans | Open end and junior lien loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	587
Agribusiness and Agricultural
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	57	77
Agribusiness and Agricultural | Loans secured by farmland
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	57	77
Agribusiness and Agricultural | Loans secured by farmland | Level 1
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Agribusiness and Agricultural | Loans secured by farmland | Level 2
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	0	0
Agribusiness and Agricultural | Loans secured by farmland | Level 3
Assets Measured At Fair Value On Nonrecurring Basis [Line Items]
Impaired loans	$ 57	$ 77