LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Summary of aging of the loan portfolio, by class
Nonaccrual	$ 11,936	$ 19,255	$ 15,000
Current	5,542,840	5,172,879
Total Loans	5,671,462	5,345,996	3,039,368
30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	27,787	29,297
60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	9,333	8,730
Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	5,829	10,047
Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	73,737	105,788
Current	64,455	89,594
Total Loans	73,737	105,788	3,622
Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	4,257	10,013
Commercial [Member]
Summary of aging of the loan portfolio, by class
Total Loans	4,148,118	3,824,483	2,163,705
Commercial [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Total Loans	65,410	94,235	2,732
Commercial [Member] | Construction Loans [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	748	968
Current	479,991	335,715
Total Loans	484,768	341,280
Commercial [Member] | Construction Loans [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,377	$ 815
Commercial [Member] | Construction Loans [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 248
Commercial [Member] | Construction Loans [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due
Commercial [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	$ 1,404	$ 3,782
Current	1,404	3,130
Total Loans	$ 1,404	3,782
Commercial [Member] | Construction Loans [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due		652
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	$ 3,904	1,060
Current	826,859	839,370
Total Loans	860,086	875,443
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,714	621
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	118	1,542
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	103	1,683
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	27,388	31,167
Current	24,837	29,186
Total Loans	27,388	31,167
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,412	843
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	100	5,902
Current	1,601,611	1,470,076
Total Loans	1,618,605	1,509,159
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 771	3,984
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due		237
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 995	91
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	15,128	28,869
Current	14,171	27,091
Total Loans	15,128	28,869
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	202	1,255
Commercial [Member] | Raw Land and Lots [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	415	2,359
Current	190,497	201,056
Total Loans	195,665	211,225
Commercial [Member] | Raw Land and Lots [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 229	145
Commercial [Member] | Raw Land and Lots [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due		44
Commercial [Member] | Raw Land and Lots [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due		194
Commercial [Member] | Raw Land and Lots [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	$ 4,524	7,427
Current	4,155	6,905
Total Loans	$ 4,524	$ 7,427
Commercial [Member] | Raw Land and Lots [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due
Commercial [Member] | Single Family Investment Real Estate [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	$ 967	$ 2,070
Current	409,360	389,648
Total Loans	429,489	412,494
Commercial [Member] | Single Family Investment Real Estate [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,576	2,825
Commercial [Member] | Single Family Investment Real Estate [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,783	338
Commercial [Member] | Single Family Investment Real Estate [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	432	734
Commercial [Member] | Single Family Investment Real Estate [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	14,371	16,879
Current	12,576	14,241
Total Loans	14,371	16,879
Commercial [Member] | Single Family Investment Real Estate [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	618	1,311
Commercial [Member] | Commercial and Industrial [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	908	3,286
Current	463,674	384,307
Total Loans	467,613	393,776
Commercial [Member] | Commercial and Industrial [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,029	1,250
Commercial [Member] | Commercial and Industrial [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	27	529
Commercial [Member] | Commercial and Industrial [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	124	549
Commercial [Member] | Commercial and Industrial [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	1,851	3,855
Current	1,621	3,173
Total Loans	1,851	3,855
Commercial [Member] | Commercial and Industrial [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 21	538
Commercial [Member] | Other Commercial [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual		74
Current	$ 90,693	78,732
Total Loans	91,892	81,106
Commercial [Member] | Other Commercial [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 296	42
Commercial [Member] | Other Commercial [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due		$ 2
Commercial [Member] | Other Commercial [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 159
Commercial [Member] | Other Commercial [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	744	$ 2,256
Current	689	1,016
Total Loans	744	2,256
Commercial [Member] | Other Commercial [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	42	1,133
Consumer [Member]
Summary of aging of the loan portfolio, by class
Total Loans	1,523,344	1,521,513	875,663
Consumer [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Total Loans	8,327	$ 11,553	$ 890
Consumer [Member] | Construction Loans [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	869
Current	47,952	$ 72,688
Total Loans	49,359	74,168
Consumer [Member] | Construction Loans [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 297	$ 120
Consumer [Member] | Construction Loans [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due
Consumer [Member] | Construction Loans [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due		$ 844
Consumer [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	$ 241	$ 516
Current
Consumer [Member] | Construction Loans [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	241	$ 516
Consumer [Member] | Mortgage [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	1,996	2,485
Current	447,843	447,026
Total Loans	474,034	478,151
Consumer [Member] | Mortgage [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	11,467	12,851
Consumer [Member] | Mortgage [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	4,799	4,300
Consumer [Member] | Mortgage [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,889	4,095
Consumer [Member] | Mortgage [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	5,040	7,394
Current	2,893	2,553
Consumer [Member] | Mortgage [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,239	$ 2,866
Consumer [Member] | Indirect Auto [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	192
Current	223,149	$ 197,238
Total Loans	225,815	199,411
Consumer [Member] | Indirect Auto [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,202	1,593
Consumer [Member] | Indirect Auto [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	222	263
Consumer [Member] | Indirect Auto [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 50	$ 317
Consumer [Member] | Indirect Auto [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired
Consumer [Member] | Indirect Marine [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual		$ 201
Current	$ 43,512	42,839
Total Loans	43,717	43,190
Consumer [Member] | Indirect Marine [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 205	$ 150
Consumer [Member] | Indirect Marine [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due
Consumer [Member] | Indirect Marine [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due
Consumer [Member] | Indirect Marine [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired
Consumer [Member] | HELOCs [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	$ 910	$ 258
Current	487,113	493,464
Total Loans	494,192	500,579
Consumer [Member] | HELOCs [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,504	3,082
Consumer [Member] | HELOCs [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,112	955
Consumer [Member] | HELOCs [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	762	820
Consumer [Member] | HELOCs [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	1,791	2,000
Current	923	916
Consumer [Member] | HELOCs [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	458	$ 728
Consumer [Member] | Credit Card [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual
Current		$ 23,666
Total Loans		24,225
Consumer [Member] | Credit Card [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due		232
Consumer [Member] | Credit Card [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due		108
Consumer [Member] | Credit Card [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due		$ 219
Consumer [Member] | Credit Card [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired
Consumer [Member] | Other Consumer [Member]
Summary of aging of the loan portfolio, by class
Nonaccrual	927	$ 592
Current	230,586	197,054
Total Loans	236,227	201,789
Consumer [Member] | Other Consumer [Member] | 30 to 59 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	2,120	1,587
Consumer [Member] | Other Consumer [Member] | 60 to 89 Days Past Due [Member]
Summary of aging of the loan portfolio, by class
Past Due	1,024	412
Consumer [Member] | Other Consumer [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	315	501
Consumer [Member] | Other Consumer [Member] | Purchased Impaired [Member]
Summary of aging of the loan portfolio, by class
Purchased Impaired	1,255	1,643
Current	1,186	1,383
Consumer [Member] | Other Consumer [Member] | Purchased Impaired [Member] | Greater Than 90 Days and still Accruing [Member]
Summary of aging of the loan portfolio, by class
Past Due	$ 24	$ 171