SECURITIES, Securities with Unrealized Losses in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Continuous unrealized loss position, fair value [Abstract]
Less than 12 months	$ 205,700	$ 152,809
12 months or more	76,569	76,359
Total	282,269	229,168
Continuous unrealized loss position, unrealized loss [Abstract]
Less than 12 months	(4,363)	(1,201)
12 months or more	(3,346)	(1,901)
Total	(7,709)	(3,102)
U.S. Government Sponsored Agency Securities [Member]
Continuous unrealized loss position, fair value [Abstract]
Less than 12 months	2,005	6,780
12 months or more	12,018	10,335
Total	14,023	17,115
Continuous unrealized loss position, unrealized loss [Abstract]
Less than 12 months	(31)	(41)
12 months or more	(201)	(138)
Total	(232)	(179)
U.S. Government Sponsored Agency MBS - Residential [Member]
Continuous unrealized loss position, fair value [Abstract]
Less than 12 months	158,444	134,211
12 months or more	48,235	47,682
Total	206,679	181,893
Continuous unrealized loss position, unrealized loss [Abstract]
Less than 12 months	(3,866)	(1,076)
12 months or more	(2,304)	(1,140)
Total	(6,170)	(2,216)
U.S. Government Sponsored Agency CMO's - Residential [Member]
Continuous unrealized loss position, fair value [Abstract]
Less than 12 months	41,235	8,306
12 months or more	15,843	17,868
Total	57,078	26,174
Continuous unrealized loss position, unrealized loss [Abstract]
Less than 12 months	(417)	(64)
12 months or more	(833)	(617)
Total	(1,250)	(681)
Obligations of States and Political Subdivisions [Member]
Continuous unrealized loss position, fair value [Abstract]
Less than 12 months	4,016	3,512
12 months or more	473	474
Total	4,489	3,986
Continuous unrealized loss position, unrealized loss [Abstract]
Less than 12 months	(49)	(20)
12 months or more	(8)	(6)
Total	$ (57)	$ (26)