Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs $ 5,543,621 $ 5,345,996 $ 5,171,003
Commercial Construction [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 429,645 341,280  
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 863,551 875,443  
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 1,586,334 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 187,182 211,225  
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 436,340 412,494  
Commercial and Industrial [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 444,199 393,776  
Other Commercial [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 89,344 81,106  
Mortgage [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 466,418 478,151  
Consumer Construction [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 55,718 74,168  
Indirect Auto [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 217,928 199,411  
Indirect Marine [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 42,763 43,190  
HELOCs [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs 492,202 500,579  
Credit Card [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs   24,225  
Other Consumer [Member]      
Loans stated at face amount, net of unearned income      
Loans held for investment, net of deferred fees and costs $ 231,997 $ 201,789