PARENT COMPANY FINANCIAL STATEMENTS, Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ASSETS [Abstract]
Cash	$ 40,814	$ 41,443
Premises and equipment	23,815	24,224
Other assets	2,525	1,478
Total assets	1,493,424	1,496,193
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Other liabilities	3,315	4,237
Other borrowed funds	5,000	8,859
Total liabilities	1,310,069	1,322,009
Stockholders' equity [Abstract]
Common stock	110,445	109,911
Retained earnings	74,983	66,195
Accumulated other comprehensive income (loss)	(2,073)	(1,922)
Total stockholders' equity	183,355	174,184	$ 147,232	$ 145,782
Total liabilities and stockholders' equity	1,493,424	1,496,193
Parent Company [Member]
ASSETS [Abstract]
Cash	7,894	6,699
Investment in subsidiaries	186,059	181,520
Premises and equipment	284	293
Other assets	550	427
Total assets	194,787	188,939
LIABILITIES AND STOCKHOLDERS' EQUITY [Abstract]
Other liabilities	1,056	812
Other borrowed funds	5,000	8,600
Subordinated debt	5,376	5,343
Total liabilities	11,432	14,755
Stockholders' equity [Abstract]
Common stock	110,445	109,911
Retained earnings	74,983	66,195
Accumulated other comprehensive income (loss)	(2,073)	(1,922)
Total stockholders' equity	183,355	174,184
Total liabilities and stockholders' equity	$ 194,787	$ 188,939