LOANS AND ALLOWANCE FOR LOAN LOSSES (Purchased Impaired Commercial and Consumer Loan Portfolios by Class) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	$ 5,071,331	$ 2,994,187
Total	138,431	3,622	4,019
Commercial Construction [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	322,976	212,079
Total	3,877
Commercial Real Estate - Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	851,253	497,955
Total	30,768
Commercial Real Estate - Non-Owner Occupied [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	1,412,464	753,507
Total	43,986
Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	211,478	181,045
Total	13,529	2,457
Single Family Investment Real Estate [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	357,555	233,053
Total	21,055	275
Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	379,671	211,134
Total	4,940
Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	78,020	52,226
Total	2,136
Indirect Auto [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	173,796	171,998
Total		7
Mortgage [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	480,131	225,649
Total	11,632
HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	485,763	277,013
Total	2,993	787
Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
Current	210,298	69,174
Total	3,515	96
Purchased Impaired [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	13,637	40
Greater than 90 Days	12,649	31
Current	112,145	3,551
Total	138,431	3,622	4,019	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	1,608
Current	2,269
Total	3,877
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	1,504
Greater than 90 Days	830
Current	28,434
Total	30,768
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	3,500
Greater than 90 Days	2,150
Current	38,336
Total	43,986
Purchased Impaired [Member] | Raw Land and Lots [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	1,096
Greater than 90 Days	17
Current	12,416	2,457
Total	13,529	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	3,599
Greater than 90 Days	803
Current	16,653	275
Total	21,055	275
Purchased Impaired [Member] | Commercial and Industrial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	727
Greater than 90 Days	558
Current	3,655
Total	4,940
Purchased Impaired [Member] | Other Commercial [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	238
Greater than 90 Days	690
Current	1,208
Total	2,136
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	2,286
Greater than 90 Days	4,424
Current	4,922
Total	11,632
Purchased Impaired [Member] | HELOCs [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	266
Greater than 90 Days	787	31
Current	1,940	756
Total	2,993	787
Purchased Impaired [Member] | Other Consumer [Member]
Schedule of purchased impaired commercial and consumer loan portfolios, by class
30-89 Days Past Due	421	40
Greater than 90 Days	782
Current	2,312	56
Total	$ 3,515	$ 96