LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	$ 29,297	$ 16,431
60-89 Days Past Due	8,730	3,347
Greater Than 90 Days and still Accruing	10,047	6,746
Purchased Impaired (net of credit mark)	105,788	3,622	4,565
Nonaccrual	19,255	15,035	26,200
Current	5,172,879	2,994,187
Total Loans	5,345,996	3,039,368	2,966,847
Commercial Construction [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	815
60-89 Days Past Due
Greater Than 90 Days and still Accruing
Purchased Impaired (net of credit mark)	3,782
Nonaccrual	968	1,596
Current	335,715	212,079
Total Loans	341,280	213,675
Commercial Real Estate - Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	621	514
60-89 Days Past Due	1,542
Greater Than 90 Days and still Accruing	1,683	258
Purchased Impaired (net of credit mark)	31,167
Nonaccrual	1,060	2,037
Current	839,370	497,955
Total Loans	875,443	500,764
Commercial Real Estate - Non-Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	3,984	185
60-89 Days Past Due	237	42
Greater Than 90 Days and still Accruing	91	1,996
Purchased Impaired (net of credit mark)	28,869
Nonaccrual	5,902	175
Current	1,470,076	753,507
Total Loans	1,509,159	755,905
Raw Land and Lots [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	145	922
60-89 Days Past Due	44	545
Greater Than 90 Days and still Accruing	194
Purchased Impaired (net of credit mark)	7,427	2,457
Nonaccrual	2,359	2,560
Current	201,056	181,045
Total Loans	211,225	187,529
Single Family Investment Real Estate [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	2,825	1,783
60-89 Days Past Due	338	277
Greater Than 90 Days and still Accruing	734	563
Purchased Impaired (net of credit mark)	16,879	275
Nonaccrual	2,070	1,689
Current	389,648	233,053
Total Loans	412,494	237,640
Commercial and Industrial [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	1,250	348
60-89 Days Past Due	529	152
Greater Than 90 Days and still Accruing	549	220
Purchased Impaired (net of credit mark)	3,855
Nonaccrual	3,286	3,848
Current	384,307	211,134
Total Loans	393,776	215,702
Other Commercial [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	42	87
60-89 Days Past Due	2	1
Greater Than 90 Days and still Accruing		50
Purchased Impaired (net of credit mark)	2,256
Nonaccrual	74	126
Current	78,732	52,226
Total Loans	81,106	52,490
Mortgage [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	12,851	6,779
60-89 Days Past Due	4,300	1,399
Greater Than 90 Days and still Accruing	4,095	1,141
Purchased Impaired (net of credit mark)	7,394
Nonaccrual	2,485	2,446
Current	447,026	225,649
Total Loans	478,151	237,414
Consumer Construction [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	120
60-89 Days Past Due
Greater Than 90 Days and still Accruing	844	208
Purchased Impaired (net of credit mark)	516
Nonaccrual
Current	72,688	48,776
Total Loans	74,168	48,984
Indirect Auto [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	1,593	2,237
60-89 Days Past Due	263	252
Greater Than 90 Days and still Accruing	317	349
Purchased Impaired (net of credit mark)		7
Nonaccrual
Current	197,238	171,998
Total Loans	199,411	174,843
Indirect Marine [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	150	459
60-89 Days Past Due
Greater Than 90 Days and still Accruing
Purchased Impaired (net of credit mark)
Nonaccrual	201	288
Current	42,839	37,886
Total Loans	43,190	38,633
HELOCs [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	3,082	2,124
60-89 Days Past Due	955	422
Greater Than 90 Days and still Accruing	820	1,190
Purchased Impaired (net of credit mark)	2,000	787
Nonaccrual	258	43
Current	493,464	277,013
Total Loans	500,579	281,579
Credit Card [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	232	105
60-89 Days Past Due	108	133
Greater Than 90 Days and still Accruing	219	281
Purchased Impaired (net of credit mark)
Nonaccrual
Current	23,666	22,692
Total Loans	24,225	23,211
Other Consumer [Member]
Summary of aging of the loan portfolio, by class
30-59 Days Past Due	1,587	888
60-89 Days Past Due	412	124
Greater Than 90 Days and still Accruing	501	490
Purchased Impaired (net of credit mark)	1,643	96
Nonaccrual	592	227
Current	197,054	69,174
Total Loans	201,789	70,999
Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	105,788	3,622	4,565
Current	89,594	3,551
Purchased Impaired [Member] | Commercial Construction [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	3,782
Current	3,130
Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	31,167
Current	29,186
Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	28,869
Current	27,091
Purchased Impaired [Member] | Raw Land and Lots [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	7,427	2,457
Current	6,905	2,457
Purchased Impaired [Member] | Single Family Investment Real Estate [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	16,879	275
Current	14,241	275
Purchased Impaired [Member] | Commercial and Industrial [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	3,855
Current	3,173
Purchased Impaired [Member] | Other Commercial [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	2,256
Current	1,016
Purchased Impaired [Member] | Mortgage [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	7,394
Current	2,553
Purchased Impaired [Member] | Consumer Construction [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	516
Purchased Impaired [Member] | Indirect Auto [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)		7
Current		7
Purchased Impaired [Member] | HELOCs [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	2,000	787
Current	916	756
Purchased Impaired [Member] | Other Consumer [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired (net of credit mark)	1,643	96
Current	$ 1,383	$ 56