LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	$ 5,510,385	$ 5,345,996	$ 5,233,069
Commercial Construction [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	378,204	341,280
Commercial Real Estate - Owner Occupied [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	874,582	875,443
Commercial Real Estate - Non-Owner Occupied [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	1,569,306	1,509,159
Raw Land and Lots [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	201,630	211,225
Single Family Investment Real Estate [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	435,068	412,494
Commercial and Industrial [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	450,682	393,776
Other Commercial [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	90,556	81,106
Mortgage [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	470,707	478,151
Consumer Construction [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	65,105	74,168
Indirect Auto [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	208,195	199,411
Indirect Marine [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	42,306	43,190
HELOCs [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	488,891	500,579
Credit Card [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	26,349	24,225
Other Consumer [Member]
Loans stated at face amount, net of unearned income
Loans held for investment, net of deferred fees and costs	$ 208,804	$ 201,789