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Derivative Instruments - (Details Textual)
1 Months Ended 2 Months Ended
Jun. 30, 2014
USD ($)
Derivative_Instrument
Apr. 30, 2012
USD ($)
Derivative_Instrument
Jun. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Derivative Instruments (Textual) [Abstract]        
Number of instruments held | Derivative_Instrument 2      
Interest rate contracts with corporate customers        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures     $ 71,331,000  
Offsetting interest rate contracts with other financial institutions        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures     71,331,000  
Cash Flow Hedging        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures   $ 32,000,000    
Number of instruments held | Derivative_Instrument   2    
Variable interest rate of derivatives, description   the three-month LIBOR plus a pre-determined spread    
Commitments to fund fixed-rate residential mortgage loans        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures     192,213,000 $ 62,288,000
Commitments to sell residential mortgage loans        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures     186,000,000 $ 52,000,000
First M&F | Cash Flow Hedging        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures     $ 30,000,000  
Floating Rate Liability at the Bank Level, Derivative One | Interest rate swaps        
Derivative Instruments (Textual) [Abstract]        
Term of contract 4 years      
Floating Rate Liability at the Bank Level, Derivative Two | Interest rate swaps        
Derivative Instruments (Textual) [Abstract]        
Junior subordinated debentures $ 15,000,000      
Term of contract 5 years