BUSINESS SEGMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014 segments	Dec. 31, 2013	Dec. 31, 2012
Number of Operating Segments													2
Net interest income	$ 18,352	$ 17,048	$ 16,923	$ 15,571	$ 14,528	$ 13,373	$ 12,448	$ 12,427	$ 12,759	$ 12,850	$ 12,903	$ 12,891	$ 67,894	$ 52,776	$ 51,403
Noninterest income													20,807	20,595	21,303
Total income													88,701	73,371	72,706
Provision for loan losses	1,250	1,150	1,150	1,325	1,325	750	500	850	4,525	750	1,500	1,500	4,875	3,425	8,275
Salaries and benefits													36,241	32,249	27,595
Premises and equipment													9,963	9,914	9,467
Other noninterest expense													13,336	13,020	11,268
Total noninterest expense													64,415	58,608	56,605
Income before income tax expense	6,811	6,257	6,316	4,902	3,530	3,240	3,105	4,888	2,031	4,666	4,370	5,034	24,286	14,763	16,101
Income tax expense	2,599	2,393	2,533	1,871	1,135	1,276	1,096	1,995	973	1,834	1,647	1,951	9,396	5,502	6,405
Net income	4,212	3,864	3,783	3,031	2,395	1,964	2,009	2,893	1,058	2,832	2,723	3,083	14,890	9,261	9,696
Total assets at period end	2,702,397				1,966,948				1,667,836				2,702,397	1,966,948	1,667,836
Banking [Member]
Net interest income													64,148	49,209	47,955
Noninterest income													5,336	6,417	8,545
Total income													69,484	55,626	56,500
Provision for loan losses													4,875	3,425	8,275
Salaries and benefits													28,679	26,504	22,030
Premises and equipment													9,207	9,331	8,889
Other noninterest expense													8,922	8,564	7,241
Total noninterest expense													51,683	47,824	46,435
Income before income tax expense													17,801	7,802	10,065
Income tax expense													6,873	2,908	4,081
Net income													10,928	4,894	5,984
Total assets at period end	2,676,103				1,964,514				1,666,504				2,676,103	1,964,514	1,666,504
Wealth Management Division [Member]
Net interest income													3,746	3,567	3,448
Noninterest income													15,471	14,178	12,758
Total income													19,217	17,745	16,206
Provision for loan losses
Salaries and benefits													7,562	5,745	5,565
Premises and equipment													756	583	578
Other noninterest expense													4,414	4,456	4,027
Total noninterest expense													12,732	10,784	10,170
Income before income tax expense													6,485	6,961	6,036
Income tax expense													2,523	2,594	2,324
Net income													3,962	4,367	3,712
Total assets at period end	$ 26,294				$ 2,434				$ 1,332				$ 26,294	$ 2,434	$ 1,332