ACCUMULATED OTHER COMPREHENSIVE (LOSS)/INCOME (Schedule of Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net							$ 18	$ 101		$ 83	$ 176	$ 268		$ 119	$ 527
Income tax expense	(2,922)	(6,256)	(4,908)	(3,724)	(4,479)	(4,422)	(4,085)	(3,278)	(2,256)	(3,434)	(3,139)	(3,339)	(17,810)	(16,264)	(12,168)
Net income	$ 10,369	$ 10,206	$ 7,940	$ 7,982	$ 7,308	$ 7,116	$ 6,564	$ 5,489	$ 4,343	$ 5,383	$ 5,238	$ 5,008	36,497	26,477	19,972
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense														(44)	(216)
Net income														75	311
Reclassification out of Accumulated Other Comprehensive Income [Member] | Net Unrealized Holding Gain/(Loss) on Securities Available for Sale, Net of Tax [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net														$ 119	$ 527