LOANS AND ALLOWANCE FOR LOAN LOSSES (Purchased Impaired Commercial and Consumer Loan Portfolios by Class) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 2,947,846	$ 2,903,718
Total	3,951	4,565	6,437
Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	501,377	507,249
Total	208	247
Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	173,112	193,672
Total	2,526	2,942
Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	230,962	226,813
Total	297	326
Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	196,621	214,329
Total		79
Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	173,038	154,388
Total	9	21
HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	274,256	280,980
Total	811	845
Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	88,739	101,833
Total	100	105
Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	41	3
Greater than 90 Days	209	420
Current	3,701	4,142
Total	3,951	4,565
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
Greater than 90 Days	165	193
Current	43	54
Total	208	247
Purchased Impaired [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days		81
Current	2,526	2,861
Total	2,526	2,942
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
Greater than 90 Days	12	14
Current	285	312
Total	297	326
Purchased Impaired [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days		79
Current
Total		79
Purchased Impaired [Member] | Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due		3
Greater than 90 Days		2
Current	9	16
Total	9	21
Purchased Impaired [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due
Greater than 90 Days	32	51
Current	779	794
Total	811	845
Purchased Impaired [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	41
Greater than 90 Days
Current	59	105
Total	$ 100	$ 105