BUSINESS SEGMENTS (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Number of Operating Segments | segment			2
Net interest income	$ 28,142	$ 29,992	$ 85,778	$ 82,555
Noninterest income	10,983	8,831	32,938	24,021
Total income	39,125	38,823	118,716	106,576
Provision for loan and lease losses	500	400	2,050	4,200
Compensation and benefits	16,025	13,996	46,430	38,660
Premises and equipment expense	3,399	2,945	10,075	8,794
FDIC expense	593	583	1,798	1,871
Other noninterest expense	4,267	4,437	14,259	12,035
Total noninterest expense	24,784	22,361	74,612	65,560
Income before income tax expense	14,341	16,462	44,104	41,016
Income tax expense	3,617	6,256	10,663	14,888
NET INCOME	10,724	10,206	33,441	26,128
Total assets for period end	4,435,709	4,176,332	4,435,709	4,176,332	$ 4,260,547
Banking [Member]
Net interest income	27,032	28,687	81,833	78,372
Noninterest income	2,570	2,928	7,550	7,975
Total income	29,602	31,615	89,383	86,347
Provision for loan and lease losses	500	400	2,050	4,200
Compensation and benefits	11,257	10,992	33,520	30,792
Premises and equipment expense	2,967	2,619	8,788	7,891
FDIC expense	593	583	1,798	1,871
Other noninterest expense	2,202	2,584	7,860	6,688
Total noninterest expense	17,519	17,178	54,016	51,442
Income before income tax expense	12,083	14,437	35,367	34,905
Income tax expense	3,039	5,474	8,551	12,670
NET INCOME	9,044	8,963	26,816	22,235
Total assets for period end	4,367,950	4,148,222	4,367,950	4,148,222
Wealth Management Division [Member]
Net interest income	1,110	1,305	3,945	4,183
Noninterest income	8,413	5,903	25,388	16,046
Total income	9,523	7,208	29,333	20,229
Provision for loan and lease losses	0	0	0	0
Compensation and benefits	4,768	3,004	12,910	7,868
Premises and equipment expense	432	326	1,287	903
FDIC expense	0	0	0	0
Other noninterest expense	2,065	1,853	6,399	5,347
Total noninterest expense	7,265	5,183	20,596	14,118
Income before income tax expense	2,258	2,025	8,737	6,111
Income tax expense	578	782	2,112	2,218
NET INCOME	1,680	1,243	6,625	3,893
Total assets for period end	$ 67,759	$ 28,110	$ 67,759	$ 28,110