LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Allowance for loan losses
Beginning balance	$ 7,451	$ 6,425	$ 7,043	$ 3,998
Charge-offs	(782)	(669)	(2,276)	(1,821)
Recoveries	156	(2)	304	145
Provision for loan losses	816	1,280	2,570	4,712
Ending balance	7,641	7,034	7,641	7,034
Ending balance:
Individually evaluated for impairment	200		200		652
Collectively evaluated for impairment	5,579		5,579		4,030
Purchased credit-impaired	1,862		1,862		2,361
Total	7,641	7,034	7,641	7,034
Ending balance:
Individually evaluated for impairment	10,250		10,250		8,916
Collectively evaluated for impairment	2,594,628		2,594,628		1,204,370
Purchased credit-impaired	222,977		222,977		180,035
Total	2,827,855		2,827,855		1,393,321
Commercial Real Estate [Member]
Allowance for loan losses
Beginning balance	2,553	3,069	2,419	1,524
Charge-offs	(113)	0	(355)	(14)
Recoveries	13	4	18	22
Provision for loan losses	554	(98)	925	1,443
Ending balance	3,007	2,975	3,007	2,975
Ending balance:
Individually evaluated for impairment	28		28		57
Collectively evaluated for impairment	2,142		2,142		1,322
Purchased credit-impaired	837		837		1,040
Total	3,007	2,975	3,007	2,975
Ending balance:
Individually evaluated for impairment	5,359		5,359		4,590
Collectively evaluated for impairment	1,204,067		1,204,067		562,081
Purchased credit-impaired	133,106		133,106		103,622
Total	1,342,532		1,342,532		670,293
Commercial and Industrial [Member]
Allowance for loan losses
Beginning balance	878	1,355	805	798
Charge-offs	(170)	(64)	(616)	(141)
Recoveries	3	7	31	15
Provision for loan losses	188	231	679	857
Ending balance	899	1,529	899	1,529
Ending balance:
Individually evaluated for impairment	162		162		323
Collectively evaluated for impairment	737		737		482
Purchased credit-impaired	0		0		0
Total	899	1,529	899	1,529
Ending balance:
Individually evaluated for impairment	1,815		1,815		343
Collectively evaluated for impairment	419,788		419,788		219,251
Purchased credit-impaired	16,308		16,308		11,020
Total	437,911		437,911		230,614
Construction Loans [Member]
Allowance for loan losses
Beginning balance	1,393	999	1,400	597
Charge-offs	(70)	(361)	(266)	(478)
Recoveries	67	(38)	69	9
Provision for loan losses	115	559	302	1,031
Ending balance	1,505	1,159	1,505	1,159
Ending balance:
Individually evaluated for impairment	3		3		0
Collectively evaluated for impairment	1,401		1,401		1,139
Purchased credit-impaired	101		101		261
Total	1,505	1,159	1,505	1,159
Ending balance:
Individually evaluated for impairment	1,284		1,284		2,609
Collectively evaluated for impairment	296,098		296,098		137,911
Purchased credit-impaired	35,079		35,079		35,274
Total	332,461		332,461		175,794
Residential Real Estate [Member]
Allowance for loan losses
Beginning balance	1,786	852	1,673	940
Charge-offs	(251)	(85)	(458)	(509)
Recoveries	49	17	73	79
Provision for loan losses	(129)	418	167	692
Ending balance	1,455	1,202	1,455	1,202
Ending balance:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	584		584		688
Purchased credit-impaired	871		871		985
Total	1,455	1,202	1,455	1,202
Ending balance:
Individually evaluated for impairment	1,382		1,382		695
Collectively evaluated for impairment	336,188		336,188		164,106
Purchased credit-impaired	31,404		31,404		26,577
Total	368,974		368,974		191,378
Consumer Construction and Development [Member]
Allowance for loan losses
Beginning balance	181	34	187	18
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision for loan losses	4	9	(2)	25
Ending balance	185	43	185	43
Ending balance:
Individually evaluated for impairment	0		0		0
Collectively evaluated for impairment	185		185		187
Purchased credit-impaired	0		0		0
Total	185	43	185	43
Ending balance:
Individually evaluated for impairment	0		0		242
Collectively evaluated for impairment	28,234		28,234		20,447
Purchased credit-impaired	2,012		2,012		1,831
Total	30,246		30,246		22,520
Home Equity [Member]
Allowance for loan losses
Beginning balance	561	86	476	85
Charge-offs	(100)	(131)	(371)	(433)
Recoveries	14	4	90	9
Provision for loan losses	25	130	305	428
Ending balance	500	89	500	89
Ending balance:
Individually evaluated for impairment	7		7		270
Collectively evaluated for impairment	453		453		153
Purchased credit-impaired	40		40		53
Total	500	89	500	89
Ending balance:
Individually evaluated for impairment	410		410		424
Collectively evaluated for impairment	271,860		271,860		92,592
Purchased credit-impaired	4,381		4,381		1,374
Total	276,651		276,651		94,390
Other Consumer [Member]
Allowance for loan losses
Beginning balance	99	30	83	36
Charge-offs	(78)	(28)	(210)	(246)
Recoveries	10	4	23	11
Provision for loan losses	59	31	194	236
Ending balance	90	37	90	37
Ending balance:
Individually evaluated for impairment	0		0		2
Collectively evaluated for impairment	77		77		59
Purchased credit-impaired	13		13		22
Total	90	37	90	37
Ending balance:
Individually evaluated for impairment	0		0		13
Collectively evaluated for impairment	38,393		38,393		7,982
Purchased credit-impaired	687		687		337
Total	$ 39,080		$ 39,080		$ 8,332