ALLOWANCE FOR LOAN LOSSES: (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Unpaid principal balance
With no related allowance recorded	$ 0	$ 0
TOTAL	10,283	9,107
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	4,507	1,718
TOTAL	10,082	8,600
Allowance for loan losses
Allowance for Loan Losses Allocated	625	331
Average recorded investment
With no related allowance recorded:	0	0	$ 0
TOTAL	8,663	9,343	13,157
Interest Income Recognized
With no related allowance recorded:	0	0	0
TOTAL	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
TOTAL	0	0	0
Commercial & Industrial
Unpaid principal balance
With no related allowance recorded	802	1,181
With an allowance recorded	493	537
Recorded Investment
With no related allowance recorded:	802	1,181
With an allowance recorded:	493	537
Allowance for loan losses
Allowance for Loan Losses Allocated	146	36
Average recorded investment
With no related allowance recorded:	971	981	1,796
With an allowance recorded:	514	819	3,463
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Farmland
Unpaid principal balance
With no related allowance recorded	930	826
With an allowance recorded	3,035	0
Recorded Investment
With no related allowance recorded:	930	826
With an allowance recorded:	3,035	0
Allowance for loan losses
Allowance for Loan Losses Allocated	268	0
Average recorded investment
With no related allowance recorded:	1,265	770	0
With an allowance recorded:	669	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Non Farm, Non Residential
Unpaid principal balance
With no related allowance recorded	2,461	3,368
With an allowance recorded	0	657
Recorded Investment
With no related allowance recorded:	2,461	2,996
With an allowance recorded:	0	657
Allowance for loan losses
Allowance for Loan Losses Allocated	0	206
Average recorded investment
With no related allowance recorded:	2,781	3,096	2,080
With an allowance recorded:	131	1,016	3,682
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Agriculture
Unpaid principal balance
With no related allowance recorded	123	622
With an allowance recorded	738	0
Recorded Investment
With no related allowance recorded:	123	487
With an allowance recorded:	537	0
Allowance for loan losses
Allowance for Loan Losses Allocated	205	0
Average recorded investment
With no related allowance recorded:	239	351	0
With an allowance recorded:	279	114	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
All Other Commercial
Unpaid principal balance
With no related allowance recorded	1,238	1,367
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	1,238	1,367
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	1,308	1,477	1,175
With an allowance recorded:	0	45	483
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
First Liens
Unpaid principal balance
With no related allowance recorded	21	25
With an allowance recorded	442	524
Recorded Investment
With no related allowance recorded:	21	25
With an allowance recorded:	442	524
Allowance for loan losses
Allowance for Loan Losses Allocated	6	89
Average recorded investment
With no related allowance recorded:	23	27	18
With an allowance recorded:	483	647	460
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Home Equity
Unpaid principal balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Junior Liens
Unpaid principal balance
With an allowance recorded	0	0
Recorded Investment
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With an allowance recorded:	0	0
Interest Income Recognized
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With no related allowance recorded:	0	0	0
Multifamily
Unpaid principal balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
All Other Residential
Unpaid principal balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
Motor Vehicle
Unpaid principal balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	0	0	0
All Other Consumer
Unpaid principal balance
With no related allowance recorded	0	0
With an allowance recorded	0	0
Recorded Investment
With no related allowance recorded:	0	0
With an allowance recorded:	0	0
Allowance for loan losses
Allowance for Loan Losses Allocated	0	0
Average recorded investment
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Interest Income Recognized
With no related allowance recorded:	0	0	0
With an allowance recorded:	0	0	0
Cash Basis Interest Income Recognized
With an allowance recorded:	0	0	0
With no related allowance recorded:	$ 0	$ 0	$ 0