LOANS AND ALLOWANCE FOR LOAN LOSSES (Purchased Impaired Commercial and Consumer Loan Portfolios by Class) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 5,172,879	$ 2,994,187
Total	105,788	3,622	4,565
Commercial Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	335,715	212,079
Total	3,782
Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	839,370	497,955
Total	31,167
Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,470,076	753,507
Total	28,869
Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	201,056	181,045
Total	7,427	2,457
Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	389,648	233,053
Total	16,879	275
Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	384,307	211,134
Total	3,855
Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	78,732	52,226
Total	2,256
Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	197,238	171,998
Total		7
Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	447,026	225,649
Total	7,394
Consumer Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	72,688	48,776
Total	516
HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	493,464	277,013
Total	2,000	787
Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	197,054	69,174
Total	1,643	96
Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	6,181	40
Greater than 90 Days	10,013	31
Current	89,594	3,551
Total	105,788	3,622	4,565
Purchased Impaired [Member] | Commercial Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days	652
Current	3,130
Total	3,782
Purchased Impaired [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,138
Greater than 90 Days	843
Current	29,186
Total	31,167
Purchased Impaired [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	523
Greater than 90 Days	1,255
Current	27,091
Total	28,869
Purchased Impaired [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	522
Greater than 90 Days
Current	6,905	2,457
Total	7,427	2,457
Purchased Impaired [Member] | Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,327
Greater than 90 Days	1,311
Current	14,241	275
Total	16,879	275
Purchased Impaired [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	144
Greater than 90 Days	538
Current	3,173
Total	3,855
Purchased Impaired [Member] | Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	107
Greater than 90 Days	1,133
Current	1,016
Total	2,256
Purchased Impaired [Member] | Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days
Current		7
Total		7
Purchased Impaired [Member] | Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,975
Greater than 90 Days	2,866
Current	2,553
Total	7,394
Purchased Impaired [Member] | Consumer Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days	516
Total	516
Purchased Impaired [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	356
Greater than 90 Days	728	31
Current	916	756
Total	2,000	787
Purchased Impaired [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	89	40
Greater than 90 Days	171
Current	1,383	56
Total	$ 1,643	$ 96