LOANS: (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Total loans and leases	$ 516,363	$ 513,008
Real Estate [Member]
Total loans and leases	445,042	445,089
Commercial
Total loans and leases	44,760	41,345
Commercial | Real Estate [Member]
Total loans and leases	132,772	127,688
Construction and Land Development | Real Estate [Member]
Total loans and leases	23,358	29,763
Residential 1-4 Family | Real Estate [Member]
Total loans and leases	249,966	249,159
Multifamily | Real Estate [Member]
Total loans and leases	14,143	15,481
Farmland | Real Estate [Member]
Total loans and leases	24,803	22,998
Commercial Real Estate [Member]
Total loans and leases	44,760	41,345
Agriculture
Total loans and leases	3,957	3,494
Consumer Installment Loans
Total loans and leases	21,952	22,411
Other Loans
Total loans and leases	$ 652	$ 669