SUPPLEMENTAL DATA (unaudited) (Schedule of Unaudited Quarterly Financial Data) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Interest income	$ 45,556	$ 45,948	$ 44,603	$ 44,563	$ 42,781	$ 40,163	$ 39,674	$ 37,068	$ 180,670	$ 159,686	$ 138,727
Interest expense	14,642	15,863	15,335	14,556	13,396	12,021	10,431	8,675	60,396	44,523	27,586
Net interest income before provision for loan and lease losses	30,914	30,085	29,268	30,007	29,385	28,142	29,243	28,393	120,274	115,163	111,141
Provision for loan losses	1,950	800	1,150	100	1,500	500	300	1,250	4,000	3,550	5,850
Wealth management fee income	10,120	9,501	9,568	9,174	8,552	8,200	8,126	8,367	38,363	33,245	23,183
Securities gains/(losses), net	(45)	34	69	59	46	(325)	(36)	(78)	117	(393)
Other income	5,450	4,881	3,389	2,496	2,657	3,108	3,650	1,926
Operating expenses	26,701	26,259	26,173	25,715	25,524	24,284	24,941	23,337
Income before income tax expense	17,788	17,442	14,971	15,921	13,616	14,341	15,742	14,021	66,122	57,720	54,307
Income tax expense	5,555	5,216	3,421	4,496	2,887	3,617	3,832	3,214	18,688	13,550	17,810
Net income	$ 12,233	$ 12,226	$ 11,550	$ 11,425	$ 10,729	$ 10,724	$ 11,910	$ 10,807	$ 47,434	$ 44,170	$ 36,497
EARNINGS PER SHARE
Earnings per share-basic	$ 0.64	$ 0.63	$ 0.59	$ 0.59	$ 0.56	$ 0.56	$ 0.63	$ 0.58	$ 2.46	$ 2.33	$ 2.07
Earnings per share-diluted	$ 0.64	$ 0.63	$ 0.59	$ 0.58	$ 0.55	$ 0.56	$ 0.62	$ 0.57	$ 2.44	$ 2.31	$ 2.03