BUSINESS SEGMENTS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) segments	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)
Number of Operating Segments | segments	2
Net interest income	$ 25,591	$ 23,410
Noninterest income	7,019	6,263
Total income	32,610	29,673
Provision for loan losses	1,600	1,700
Salaries and benefits	11,913	10,908
Premises and equipment	2,816	2,864
Other noninterest expense	3,889	3,875
Total noninterest expense	20,904	20,906
INCOME BEFORE INCOME TAX EXPENSE	11,706	8,767
Income tax expense	3,724	3,278
NET INCOME	7,982	5,489
Total assets at period end	3,947,562	3,465,997	$ 3,878,633
Banking [Member]
Net interest income	24,031	21,990
Noninterest income	2,094	1,880
Total income	26,125	23,870
Provision for loan losses	1,600	1,700
Salaries and benefits	9,314	8,813
Premises and equipment	2,537	2,637
Other noninterest expense	2,702	3,917
Total noninterest expense	16,153	17,067
INCOME BEFORE INCOME TAX EXPENSE	9,972	6,803
Income tax expense	3,173	2,514
NET INCOME	6,799	4,289
Total assets at period end	3,901,134	3,412,745
Wealth Management Division [Member]
Net interest income	1,560	1,420
Noninterest income	4,925	4,383
Total income	6,485	5,803
Provision for loan losses
Salaries and benefits	2,599	2,095
Premises and equipment	279	227
Other noninterest expense	1,873	1,517
Total noninterest expense	4,751	3,839
INCOME BEFORE INCOME TAX EXPENSE	1,734	1,964
Income tax expense	551	764
NET INCOME	1,183	1,200
Total assets at period end	$ 46,428	$ 53,252