LOANS - ALLOWANCE FOR LOAN LOSSES AND RECORDED INVESTMENT (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loans
Accrued interest receivable	$ 2,600,000	$ 2,400,000
Allowance for Loan Losses:
Individually Evaluated for Impairment	23,000	541,000
Collectively Evaluated for Impairment	7,697,000	7,000,000
Total	7,720,000	7,541,000	$ 6,521,000	$ 6,012,000
Loans:
Individually Evaluated for Impairment	1,620,000	7,994,000
Collectively Evaluated for Impairment	645,282,000	646,100,000
Purchased Credit Impairment		1,913,000
Total	648,535,000	656,007,000
Commercial
Allowance for Loan Losses:
Collectively Evaluated for Impairment	975,000	789,000
Total	975,000	789,000	486,000	339,000
Loans:
Individually Evaluated for Impairment		97,000
Collectively Evaluated for Impairment	80,070,000	77,339,000
Total	80,070,000	77,436,000
Real estate construction
Allowance for Loan Losses:
Collectively Evaluated for Impairment	462,000	564,000
Total	462,000	564,000	411,000	446,000
Loans:
Individually Evaluated for Impairment		153,000
Collectively Evaluated for Impairment	20,816,000	29,016,000
Total	20,816,000	29,169,000
1-4 family residential
Allowance for Loan Losses:
Individually Evaluated for Impairment	23,000	99,000
Collectively Evaluated for Impairment	2,293,000	2,202,000
Total	2,316,000	2,301,000	2,081,000	1,829,000
Loans:
Individually Evaluated for Impairment	206,000	2,704,000
Collectively Evaluated for Impairment	237,043,000	240,906,000
Purchased Credit Impairment		1,028,000
Total	238,121,000	244,638,000
Multi-family residential
Allowance for Loan Losses:
Collectively Evaluated for Impairment	640,000	581,000
Total	640,000	581,000	458,000	495,000
Loans:
Collectively Evaluated for Impairment	39,352,000	46,637,000
Purchased Credit Impairment		562,000
Total	39,926,000	47,199,000
Non-farm & non-residential
Allowance for Loan Losses:
Individually Evaluated for Impairment		15,000
Collectively Evaluated for Impairment	1,554,000	1,188,000
Total	1,554,000	1,203,000	1,213,000	813,000
Loans:
Individually Evaluated for Impairment	1,130,000	1,725,000
Collectively Evaluated for Impairment	190,941,000	174,154,000
Purchased Credit Impairment		145,000
Total	192,074,000	176,024,000
Agricultural
Allowance for Loan Losses:
Individually Evaluated for Impairment		427,000
Collectively Evaluated for Impairment	494,000	429,000
Total	494,000	856,000	678,000	998,000
Loans:
Individually Evaluated for Impairment	284,000	3,315,000
Collectively Evaluated for Impairment	58,708,000	58,998,000
Purchased Credit Impairment		178,000
Total	59,176,000	62,491,000
Consumer
Allowance for Loan Losses:
Collectively Evaluated for Impairment	582,000	547,000
Total	582,000	547,000	525,000	520,000
Loans:
Collectively Evaluated for Impairment	18,182,000	18,867,000
Total	18,182,000	18,867,000
Other
Allowance for Loan Losses:
Collectively Evaluated for Impairment	18,000	60,000
Total	18,000	60,000	60,000	32,000
Loans:
Collectively Evaluated for Impairment	170,000	183,000
Total	170,000	183,000
Unallocated
Allowance for Loan Losses:
Collectively Evaluated for Impairment	679,000	640,000
Total	679,000	$ 640,000	$ 609,000	$ 540,000
Receivables Acquired with Deteriorated Credit Quality
Loans:
Purchased Credit Impairment	1,633,000
Receivables Acquired with Deteriorated Credit Quality | 1-4 family residential
Loans:
Purchased Credit Impairment	872,000
Receivables Acquired with Deteriorated Credit Quality | Multi-family residential
Loans:
Purchased Credit Impairment	574,000
Receivables Acquired with Deteriorated Credit Quality | Non-farm & non-residential
Loans:
Purchased Credit Impairment	3,000
Receivables Acquired with Deteriorated Credit Quality | Agricultural
Loans:
Purchased Credit Impairment	$ 184,000