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Borrowings (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Summary of borrowings    
Securities sold under agreements to repurchase $ 146,904 $ 129,208
FHLB advances 161,558 150,000
Subordinated debt 15,464 15,464
Other debt 15,877 15,933
Total $ 324,339 $ 295,141