5. INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2018	Dec. 31, 2017
Available for sale securities, Amortized Cost	$ 283,270	$ 262,778
Available for sale securities, Unrealized Gains	531	1,933
Available for sale securities, Unrealized Losses	(6,532)	(2,389)
Available for sale securities, Estimated Fair Value	277,269	262,322
Held-to-Maturity Debt securities Amortized Cost	328
Held-to-Maturity Debt securities Estimated Fair Value	328	404
US Government Agencies and Sponsored Agencies
Available for sale securities, Amortized Cost	256,018	233,956
Available for sale securities, Unrealized Gains	360	1,184
Available for sale securities, Unrealized Losses	(6,088)	(2,271)
Available for sale securities, Estimated Fair Value	250,290	232,869
Held-to-Maturity Debt securities Amortized Cost	311	378
Held-to-Maturity Debt securities Gross Unrealized Gains		26
Held-to-Maturity Debt securities Gross Unrealized Losses		0
Held-to-Maturity Debt securities Estimated Fair Value	311	404
Obligations of states and political subdivisions
Available for sale securities, Amortized Cost	15,791	22,281
Available for sale securities, Unrealized Gains	120	528
Available for sale securities, Unrealized Losses	(370)	(94)
Available for sale securities, Estimated Fair Value	15,541	22,715
Held-to-Maturity Debt securities Amortized Cost		311
Held-to-Maturity Debt securities Gross Unrealized Gains		17
Held-to-Maturity Debt securities Gross Unrealized Losses		0
Held-to-Maturity Debt securities Estimated Fair Value		328
Corporate Bonds
Available for sale securities, Amortized Cost	6,492	6,490
Available for sale securities, Unrealized Gains	51	160
Available for sale securities, Unrealized Losses	(68)	(24)
Available for sale securities, Estimated Fair Value	6,475	6,626
Held-to-Maturity Debt securities Estimated Fair Value		328
US Treasury securities
Available for sale securities, Amortized Cost	4,969
Available for sale securities, Unrealized Gains	0
Available for sale securities, Unrealized Losses	(6)
Available for sale securities, Estimated Fair Value	$ 4,963
Equity Securities - Corporate Stock
Available for sale securities, Amortized Cost		51
Available for sale securities, Unrealized Gains		61
Available for sale securities, Unrealized Losses		0
Available for sale securities, Estimated Fair Value		$ 112

Available For Sale Securities Fair Value Disclosure 1.

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