LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 4) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total	$ 2,827,855	$ 1,393,321
30-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	4,930	2,419
Commercial, Commercial and industrial	2,172	1,945
Commercial, Construction and development	433	146
Consumer, Residential real estate	4,129	5,097
Consumer, Construction and development	226	603
Consumer, Home equity	3,551	990
Consumer, Other consumer	219	245
Total	15,660	11,445
90 Days or Greater Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	2,297	2,142
Commercial, Commercial and industrial	1,671	505
Commercial, Construction and development	438	1,316
Consumer, Residential real estate	2,429	1,365
Consumer, Construction and development	84	237
Consumer, Home equity	538	701
Consumer, Other consumer	52	136
Total	7,509	6,402
Total Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	7,227	4,561
Commercial, Commercial and industrial	3,843	2,450
Commercial, Construction and development	871	1,462
Consumer, Residential real estate	6,558	6,462
Consumer, Construction and development	310	840
Consumer, Home equity	4,089	1,691
Consumer, Other consumer	271	381
Total	23,169	17,847
Current [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	1,202,199	562,110
Commercial, Commercial and industrial	417,760	217,144
Commercial, Construction and development	296,511	139,058
Consumer, Residential real estate	331,012	158,339
Consumer, Construction and development	27,924	19,849
Consumer, Home equity	268,181	91,325
Consumer, Other consumer	38,122	7,614
Total	2,581,709	1,195,439
Total Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	1,209,426	566,671
Commercial, Commercial and industrial	421,603	219,594
Commercial, Construction and development	297,382	140,520
Consumer, Residential real estate	337,570	164,801
Consumer, Construction and development	28,234	20,689
Consumer, Home equity	272,270	93,016
Consumer, Other consumer	38,393	7,995
Total	2,604,878	1,213,286
Non-PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	1,209,426	566,671
Commercial, Commercial and industrial	421,603	219,594
Commercial, Construction and development	297,382	140,520
Consumer, Residential real estate	337,570	164,801
Consumer, Construction and development	28,234	20,689
Consumer, Home equity	272,270	93,016
Consumer, Other consumer	38,393	7,995
Total	2,604,878	1,213,286
Non-PCI Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	1,172,626	532,669
Commercial, Commercial and industrial	411,102	210,382
Commercial, Construction and development	292,795	134,074
Consumer, Residential real estate	323,963	153,123
Consumer, Construction and development	27,144	19,566
Consumer, Home equity	264,393	87,891
Consumer, Other consumer	37,924	7,773
Total	2,529,947	1,145,478
Non-PCI Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	25,023	24,245
Commercial, Commercial and industrial	5,465	5,195
Commercial, Construction and development	2,644	3,400
Consumer, Residential real estate	7,516	7,812
Consumer, Construction and development	1,010	921
Consumer, Home equity	4,780	2,524
Consumer, Other consumer	212	43
Total	46,650	44,140
Non-PCI Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	11,777	9,757
Commercial, Commercial and industrial	5,036	3,993
Commercial, Construction and development	1,943	2,847
Consumer, Residential real estate	6,091	3,866
Consumer, Construction and development	80	202
Consumer, Home equity	3,097	2,601
Consumer, Other consumer	257	179
Total	28,281	23,445
Non-PCI Loans [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	0	0
Commercial, Commercial and industrial	0	24
Commercial, Construction and development	0	199
Consumer, Residential real estate	0	0
Consumer, Construction and development	0	0
Consumer, Home equity	0	0
Consumer, Other consumer	0	0
Total	0	223
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	133,106	103,622
Commercial, Commercial and industrial	16,308	11,020
Commercial, Construction and development	35,079	35,274
Consumer, Residential real estate	31,404	26,577
Consumer, Construction and development	2,012	1,831
Consumer, Home equity	4,381	1,374
Consumer, Other consumer	687	337
Total	222,977	180,035
PCI Loans [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	60,073	53,900
Commercial, Commercial and industrial	6,731	7,921
Commercial, Construction and development	7,524	9,666
Consumer, Residential real estate	12,164	13,794
Consumer, Construction and development	198	212
Consumer, Home equity	46	28
Consumer, Other consumer	2	21
Total	86,738	85,542
PCI Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	50,807	35,399
Commercial, Commercial and industrial	4,618	2,382
Commercial, Construction and development	22,130	17,408
Consumer, Residential real estate	9,549	7,070
Consumer, Construction and development	760	510
Consumer, Home equity	2,660	850
Consumer, Other consumer	521	281
Total	91,045	63,900
PCI Loans [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	22,226	14,323
Commercial, Commercial and industrial	4,959	669
Commercial, Construction and development	5,425	7,124
Consumer, Residential real estate	9,691	5,692
Consumer, Construction and development	1,054	1,109
Consumer, Home equity	1,675	496
Consumer, Other consumer	164	35
Total	45,194	29,448
PCI Loans [Member] | Doubtful [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial, Real estate	0	0
Commercial, Commercial and industrial	0	48
Commercial, Construction and development	0	1,076
Consumer, Residential real estate	0	21
Consumer, Construction and development	0	0
Consumer, Home equity	0	0
Consumer, Other consumer	0	0
Total	$ 0	$ 1,145