LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Acquired with Deteriorated Credit Quality Loan Portfolio by Class) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 5,379,529	$ 5,172,879
Total	87,841	105,788	$ 131,107
Commercial Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	373,250	335,715
Total	2,921	3,782
Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	839,904	839,370
Total	29,838	31,167
Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,543,757	1,470,076
Total	20,016	28,869
Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	195,654	201,056
Total	5,103	7,427
Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	417,548	389,648
Total	15,504	16,879
Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	444,062	384,307
Total	3,025	3,855
Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	88,803	78,732
Total	1,112	2,256
Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 206,120	$ 197,238
Total
Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 453,087	$ 447,026
Total	6,605	7,394
Consumer Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	63,778	72,688
Total	508	516
HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	482,698	493,464
Total	1,840	2,000
Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	203,046	197,054
Total	1,369	1,643
Receivables Acquired with Deteriorated Credit Quality [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	5,125	6,181
Greater than 90 Days	7,175	10,013
Current	75,541	89,594
Total	$ 87,841	$ 105,788
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days	$ 609	$ 652
Current	2,312	3,130
Total	2,921	3,782
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,029	1,138
Greater than 90 Days	1,484	843
Current	27,325	29,186
Total	29,838	31,167
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,775	523
Greater than 90 Days	321	1,255
Current	17,920	27,091
Total	20,016	28,869
Receivables Acquired with Deteriorated Credit Quality [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	376	$ 522
Greater than 90 Days	105
Current	4,622	$ 6,905
Total	5,103	7,427
Receivables Acquired with Deteriorated Credit Quality [Member] | Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	425	1,327
Greater than 90 Days	686	1,311
Current	14,393	14,241
Total	15,504	16,879
Receivables Acquired with Deteriorated Credit Quality [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	226	144
Greater than 90 Days	68	538
Current	2,731	3,173
Total	3,025	3,855
Receivables Acquired with Deteriorated Credit Quality [Member] | Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	120	107
Greater than 90 Days	184	1,133
Current	808	1,016
Total	1,112	2,256
Receivables Acquired with Deteriorated Credit Quality [Member] | Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	916	1,975
Greater than 90 Days	2,557	2,866
Current	3,132	2,553
Total	$ 6,605	$ 7,394
Receivables Acquired with Deteriorated Credit Quality [Member] | Consumer Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days	$ 508	$ 516
Current
Total	508	$ 516
Receivables Acquired with Deteriorated Credit Quality [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	210	356
Greater than 90 Days	501	728
Current	1,129	916
Total	1,840	2,000
Receivables Acquired with Deteriorated Credit Quality [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	48	89
Greater than 90 Days	152	171
Current	1,169	1,383
Total	$ 1,369	$ 1,643