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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Derivative Instruments in Statement of Financial Position Carrying Value [Table Text Block]

The fair value of these mortgage banking derivatives are reflected by a derivative asset or a derivative liability. The table below provides data about the carrying values of these derivative instruments:

 

    December 31, 2012     December 31, 2011  
                                     
    Assets     (Liabilities)           Assets     (Liabilities)        
                Derivative                 Derivative  
    Carrying     Carrying     Net Carrying     Carrying     Carrying     Net Carrying  
    Value     Value     Value     Value     Value     Value  
    (In Thousands)  
Derivatives not designated as hedging instruments                                                
Mortgage Banking Derivatives   $ 950     $ (94 )   $ 856     $ 865     $ (258 )   $ 607  
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

The table below provides data about the amount of gains and losses recognized in income on derivative instruments not designated as hedging instruments:

 

    Twelve Months Ended December 31,  
    2012     2011     2010  
Derivatives not designated as hedging instruments                        
                         
Mortgage Banking Derivatives – Gain (Loss)   $ 249     $ 252     $ (115 )