INVESTMENT SECURITIES (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Investment securities available-for-sale [Abstract]
Amortized cost	$ 302,001		$ 320,062
Unrealized gains	1,001		465
Unrealized losses	(4,353)		(5,890)
Estimated fair value	298,649		314,637
Proceeds from calls and maturities of available-for-sale securities	17,000	$ 11,115
Gross realized gains from sales/calls of available-for-sale securities	0	0
Gross realized losses from sales/calls of available-for-sale securities	0	$ 0
U.S. Treasury Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	43,402		50,825
Unrealized gains	258		14
Unrealized losses	(100)		(157)
Estimated fair value	43,560		50,682
Securities of U.S. Government Agencies and Corporations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	33,670		42,215
Unrealized gains	109		89
Unrealized losses	(154)		(228)
Estimated fair value	33,625		42,076
Obligations of States and Political Subdivisions [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	22,663		19,110
Unrealized gains	272		181
Unrealized losses	(72)		(123)
Estimated fair value	22,863		19,168
Collateralized Mortgage Obligations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	66,511		65,615
Unrealized gains	67		34
Unrealized losses	(1,447)		(1,850)
Estimated fair value	65,131		63,799
Mortgage-backed Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	135,755		142,297
Unrealized gains	295		147
Unrealized losses	(2,580)		(3,532)
Estimated fair value	$ 133,470		$ 138,912