LOANS AND ALLOWANCE FOR LOAN LOSSES (Loans Stated at Face Amount, Net of Unearned Income) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loans stated at face amount, net of unearned income
Loans, net of unearned income	$ 5,345,996	$ 3,039,368	$ 2,966,847
Commercial Construction [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	341,280	213,675
Commercial Real Estate - Owner Occupied [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	875,443	500,764
Commercial Real Estate - Non-Owner Occupied [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	1,509,159	755,905
Raw Land and Lots [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	211,225	187,529
Single Family Investment Real Estate [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	412,494	237,640
Commercial and Industrial [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	393,776	215,702
Other Commercial [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	81,106	52,490
Mortgage [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	478,151	237,414
Consumer Construction [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	74,168	48,984
Indirect Auto [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	199,411	174,843
Indirect Marine [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	43,190	38,633
HELOCs [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	500,579	281,579
Credit Card [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	24,225	23,211
Other Consumer [Member]
Loans stated at face amount, net of unearned income
Loans, net of unearned income	$ 201,789	$ 70,999