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Derivative Instruments (Details Textual) (USD $)
 1 Months Ended 3 Months Ended 3 Months Ended
May 31, 2011
Aug. 31, 2008
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Mar. 31, 2013
Interest rate swap [Member]
Mar. 31, 2012
Interest rate swap [Member]
Mar. 31, 2013
LIBOR plus 155 basis points [Member]
Mar. 31, 2012
LIBOR plus 155 basis points [Member]
Mar. 31, 2013
4.29% Fixed Rate Plus 155 Basis Points [Member]
Mar. 31, 2012
4.29% Fixed Rate Plus 155 Basis Points [Member]
Mar. 31, 2013
4.02% fixed rate plus 155 basis points [Member]
Mar. 31, 2012
4.02% fixed rate plus 155 basis points [Member]
Interest Rate Swaps (Textual) [Abstract]                          
Term of interest rate swap agreement executed   5 years                      
Value of subordinated note hedged     $ 10,000,000                    
Interest rate swap inception date     Aug. 01, 2008                    
Interest rate swap maturity date     Sep. 15, 2013                    
Interest rate The interest rate swap involves the receipt of variable-rate amounts in exchange for fixed-rate payments from September 15, 2013 to September 15, 2018 without exchange of the underlying notional amount The interest rate swap involves the receipt of variable-rate amounts in exchange for fixed-rate payments from August 1, 2008 to September 15, 2013 without exchange of the underlying notional amount                      
Derivatives designated as fair value hedges     0                    
Variable rate on the subordinated debt on effective date in case of interest rate swap               LIBOR plus 155 basis points LIBOR plus 155 basis points 4.29% fixed rate plus 155 basis points 4.29% fixed rate plus 155 basis points 4.02% fixed rate plus 155 basis points 4.02% fixed rate plus 155 basis points
Variable interest rate on subordinate debt     1.83%                    
Interest rate being paid by the corporation                   5.84%   5.57%  
Derivative variable rate basis     1.55%   4.02% 1.55% 4.29%            
Accumulated other comprehensive loss estimated     386,000                    
Line Of Credit, Basis Spread on LIBOR     1.55%                    
Collateral amount for counterparty interest rate swap     $ 1,950,000 $ 1,950,000