SECURITIES - UNREALIZED LOSSES (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Securities with unrealized losses
Less than 12 Months, Fair Value	$ 158,302	$ 147,911
Less than 12 Months, Unrealized Loss	(3,796)	(1,475)
12 Months or More, Fair Value	119,992	77,592
12 Months or More, Unrealized Loss	(5,722)	(2,057)
Total, Fair Value	278,294	225,503
Total, Unrealized Loss	(9,518)	(3,532)
U.S. treasury notes
Securities with unrealized losses
Less than 12 Months, Fair Value	3,940	4,024
Less than 12 Months, Unrealized Loss	(96)	(22)
Total, Fair Value	3,940	4,024
Total, Unrealized Loss	(96)	(22)
U.S. government agencies
Securities with unrealized losses
Less than 12 Months, Fair Value	17,730	18,405
Less than 12 Months, Unrealized Loss	(362)	(130)
12 Months or More, Fair Value	14,191	12,692
12 Months or More, Unrealized Loss	(529)	(228)
Total, Fair Value	31,921	31,097
Total, Unrealized Loss	(891)	(358)
States and political subdivisions
Securities with unrealized losses
Less than 12 Months, Fair Value	62,866	15,442
Less than 12 Months, Unrealized Loss	(924)	(97)
12 Months or More, Fair Value	8,089	2,769
12 Months or More, Unrealized Loss	(327)	(36)
Total, Fair Value	70,955	18,211
Total, Unrealized Loss	(1,251)	(133)
Mortgage-backed - residential
Securities with unrealized losses
Less than 12 Months, Fair Value	52,283	70,646
Less than 12 Months, Unrealized Loss	(2,342)	(817)
12 Months or More, Fair Value	74,423	54,760
12 Months or More, Unrealized Loss	(3,926)	(1,513)
Total, Fair Value	126,706	125,406
Total, Unrealized Loss	(6,268)	(2,330)
Mortgage-backed - commercial
Securities with unrealized losses
Less than 12 Months, Fair Value	21,483	39,394
Less than 12 Months, Unrealized Loss	(72)	(409)
12 Months or More, Fair Value	23,289	7,371
12 Months or More, Unrealized Loss	(940)	(280)
Total, Fair Value	44,772	46,765
Total, Unrealized Loss	$ (1,012)	$ (689)