LOANS AND ALLOWANCE FOR LOAN LOSSES (Purchased Impaired Commercial and Consumer Loan Portfolios by Class) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 5,542,840	$ 5,172,879
Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	64,455	89,594
Total	73,737	105,788
Commercial [Member] | Construction Loans [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	479,991	335,715
Commercial [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,404	3,130
Total	1,404	3,782
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	826,859	839,370
Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	24,837	29,186
Total	27,388	31,167
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,601,611	1,470,076
Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	14,171	27,091
Total	15,128	28,869
Commercial [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	190,497	201,056
Commercial [Member] | Raw Land and Lots [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	4,155	6,905
Total	4,524	7,427
Commercial [Member] | Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	409,360	389,648
Commercial [Member] | Single Family Investment Real Estate [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	12,576	14,241
Total	14,371	16,879
Commercial [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	463,674	384,307
Commercial [Member] | Commercial and Industrial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,621	3,173
Total	1,851	3,855
Commercial [Member] | Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	90,693	78,732
Commercial [Member] | Other Commercial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	689	1,016
Total	744	2,256
Consumer [Member] | Construction Loans [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	47,952	$ 72,688
Consumer [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current
Total	241	$ 516
Consumer [Member] | Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	447,843	447,026
Consumer [Member] | Mortgage [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	2,893	2,553
Total	5,040	7,394
Consumer [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	487,113	493,464
Consumer [Member] | HELOCs [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	923	916
Total	1,791	2,000
Consumer [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	230,586	197,054
Consumer [Member] | Other Consumer [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,186	1,383
Total	1,255	1,643
30 To 89 Days Past Due [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 5,025	$ 6,181
30 To 89 Days Past Due [Member] | Commercial [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due
30 To 89 Days Past Due [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 1,139	$ 1,138
30 To 89 Days Past Due [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	755	523
30 To 89 Days Past Due [Member] | Commercial [Member] | Raw Land and Lots [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	369	522
30 To 89 Days Past Due [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	1,177	1,327
30 To 89 Days Past Due [Member] | Commercial [Member] | Commercial and Industrial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	209	144
30 To 89 Days Past Due [Member] | Commercial [Member] | Other Commercial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 13	$ 107
30 To 89 Days Past Due [Member] | Consumer [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due
30 To 89 Days Past Due [Member] | Consumer [Member] | Mortgage [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 908	$ 1,975
30 To 89 Days Past Due [Member] | Consumer [Member] | HELOCs [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	410	356
30 To 89 Days Past Due [Member] | Consumer [Member] | Other Consumer [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	45	89
Greater Than 90 Days and still Accruing [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	5,829	10,047
Greater Than 90 Days and still Accruing [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 4,257	$ 10,013
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Construction Loans [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due		$ 652
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 103	1,683
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial Real Estate - Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	1,412	843
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	995	91
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial Real Estate - Non-Owner Occupied [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 202	1,255
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due		$ 194
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Raw Land and Lots [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 432	$ 734
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Single Family Investment Real Estate [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	618	1,311
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	124	549
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Commercial and Industrial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	21	$ 538
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	159
Greater Than 90 Days and still Accruing [Member] | Commercial [Member] | Other Commercial [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 42	$ 1,133
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Construction Loans [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due		844
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Construction Loans [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 241	516
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	2,889	4,095
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Mortgage [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	1,239	2,866
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	762	820
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | HELOCs [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	458	728
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	315	501
Greater Than 90 Days and still Accruing [Member] | Consumer [Member] | Other Consumer [Member] | Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Past Due	$ 24	$ 171