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Loans (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Summary of other Loans held for sale      
Other loans held for sale $ 14,446 $ 17,258 $ 14,178
Percentage of loans receivable held for sale net 100.00%   100.00%
Commercial real estate [Member]
     
Summary of other Loans held for sale      
Other loans held for sale 10,176   14,703
Percentage of loans receivable held for sale net 70.40%   100.00%
Single-family residential [Member]
     
Summary of other Loans held for sale      
Other loans held for sale 2,298    
Percentage of loans receivable held for sale net 15.90%    
Commercial and industrial [Member]
     
Summary of other Loans held for sale      
Other loans held for sale 910    
Percentage of loans receivable held for sale net 6.30%    
Consumer [Member]
     
Summary of other Loans held for sale      
Other loans held for sale 228    
Percentage of loans receivable held for sale net 1.60%    
Other [Member]
     
Summary of other Loans held for sale      
Other loans held for sale $ 834    
Percentage of loans receivable held for sale net 5.80%