Business Combinations (Details Textual) (USD $)
12 Months Ended 0 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 15, 2012
Sep. 19, 2014
branch
Business Acquisition [Line Items]          
Pretax gain $ 0 $ 0 $ 4,218,000    
Percentage of losses on covered assets obligated to reimburse 80.00%        
Commercial          
Business Acquisition [Line Items]          
Percentage of losses on covered assets obligated to reimburse       80.00%  
FDIC loss sharing period       5 years  
Securities Exchange Bank          
Business Acquisition [Line Items]          
Cash payment received from the FDIC       14,900,000  
Pretax gain       4,200,000  
Decatur First Bank | Residential mortgage          
Business Acquisition [Line Items]          
Percentage of losses on covered assets obligated to reimburse       80.00%  
FDIC loss sharing period       10 years  
Fidelity Bank and Security Exchange Bank          
Business Acquisition [Line Items]          
Pro forma comparative revenue     170,100,000    
Proforma comparative pretax net income     34,800,000    
Florida Capital Bank, N.A.          
Business Acquisition [Line Items]          
Number of branches in which deposits assumed         6
Number of branches acquired         5
Net proceeds received from deposit assumption and branch acquisition transaction         162,000,000
Premium on deposits         1.50%
Deposit balances assumed         170,900,000
Real and personal property acquired         7,200,000
Core deposit intangible recognized         1,800,000
Other accrued liabilities assumed         $ 100,000