Deposits (Details 1) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Contractual maturities of certificates of deposits    
2013 $ 236,598  
2014 187,672  
2015 34,411  
2016 23,157  
2017 14,252  
Total $ 496,090 $ 504,390