FAIR VALUE - Assets Measured at Fair Value on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring [Member] - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 10,039	$ 12,121
Other real estate owned	0	0
Total assets	10,039	12,121
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Other real estate owned	0	0
Total assets	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	10,039	12,121
Other real estate owned	0	0
Total assets	10,039	12,121
Commercial and Industrial Loans [Member] | Commercial Loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,002	3,126
Commercial and Industrial Loans [Member] | Commercial Loan | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans [Member] | Commercial Loan | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans [Member] | Commercial Loan | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	2,002	3,126
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,332	6,374
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	5,332	6,374
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		43
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		43
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,527	1,449
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	1,527	1,449
Agribusiness and Agricultural | Loans Secured By Farmland
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	90	57
Agribusiness and Agricultural | Loans Secured By Farmland | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Agribusiness and Agricultural | Loans Secured By Farmland | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Agribusiness and Agricultural | Loans Secured By Farmland | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	90	57
Agribusiness and Agricultural | Other Commercial Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Agribusiness and Agricultural | Other Commercial Loans | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Agribusiness and Agricultural | Other Commercial Loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Agribusiness and Agricultural | Other Commercial Loans | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	459	474
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	459	474
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	587	587
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	587	587
Consumer 1-4 Family Mortgage Loans [Member] | Home Equity Mortgage Open Ended Revolving Lines [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	42
Consumer 1-4 Family Mortgage Loans [Member] | Home Equity Mortgage Open Ended Revolving Lines [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
Consumer 1-4 Family Mortgage Loans [Member] | Home Equity Mortgage Open Ended Revolving Lines [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	0
Consumer 1-4 Family Mortgage Loans [Member] | Home Equity Mortgage Open Ended Revolving Lines [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans	$ 42
Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		11
Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		0
Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired loans		$ 11