SECURITIES - Securitites Held to Maturity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	$ 3,781,000	$ 4,705,000
Estimated Fair Value	3,776,000	4,912,000
Unrealized Gains	0	207,000
Unrealized Losses	5,000	0
Amortized Cost
Within one year	988,000
After one, but within five years	2,560,000
After five, but within ten years	233,000
After ten years	0
Total	3,781,000	4,705,000
Fair Value
Within one year	986,000
After one, but within five years	2,557,000
After five, but within ten years	233,000
After ten years	0
Total	3,776,000	4,912,000
Gain (loss) on sale of held-to-maturity securities	0	0
Obligations of states and political subdivisions
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	1,946,000	3,725,000
Estimated Fair Value	1,946,000	3,931,000
Unrealized Gains	0	206,000
Unrealized Losses	0	0
Amortized Cost
Total	1,946,000	3,725,000
Fair Value
Total	1,946,000	3,931,000
Time deposits with other financial institutions
Amortized cost and estimated fair value of securities held to maturity [Abstract]
Amortized Cost	1,835,000	980,000
Estimated Fair Value	1,830,000	981,000
Unrealized Gains	0	1,000
Unrealized Losses	5,000	0
Amortized Cost
Total	1,835,000	980,000
Fair Value
Total	$ 1,830,000	$ 981,000