FAIR VALUE - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	$ 10,329	$ 11,506
Other real estate owned	0	316
Total assets	10,329	11,822
Level 1
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 2
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 3
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	10,329	11,506
Other real estate owned	0	316
Total assets	10,329	11,822
Commercial and Industrial Loans | Working Capital Lines of Credit Loans
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	3,152	4,092
Commercial and Industrial Loans | Working Capital Lines of Credit Loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Commercial and Industrial Loans | Working Capital Lines of Credit Loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Commercial and Industrial Loans | Working Capital Lines of Credit Loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	3,152	4,092
Commercial and Industrial Loans | Non-working Capital Loans
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	5,103	4,967
Commercial and Industrial Loans | Non-working Capital Loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Commercial and Industrial Loans | Non-working Capital Loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Commercial and Industrial Loans | Non-working Capital Loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	5,103	4,967
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans		148
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans		0
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans | Level 2
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans		0
Commercial Real Estate and Multi-family Residential Loans | Construction and Land Development Loans | Level 3
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans		148
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	973	1,669
Commercial Real Estate and Multi-family Residential Loans | Owner Occupied Loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
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
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
Impaired loans	973	1,669
Agribusiness and Agricultural | Loans Secured By Farmland
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	57	77
Agribusiness and Agricultural | Loans Secured By Farmland | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Agribusiness and Agricultural | Loans Secured By Farmland | Level 2
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	0	0
Agribusiness and Agricultural | Loans Secured By Farmland | Level 3
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	57	77
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans
Assets Measured At Fair Value On Nonrecurring Basis
Impaired loans	457	553
Consumer 1-4 Family Mortgage Loans | Closed End First Mortgage Loans | Level 1
Assets Measured At Fair Value On Nonrecurring Basis
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
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
Impaired loans	457	$ 553
Consumer 1-4 Family Mortgage Loans | Open End and Junior Lien Loans
Assets Measured At Fair Value On Nonrecurring Basis
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
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
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
Impaired loans	$ 587