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Borrowings (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Borrowings    
Federal Home Loan Bank advances, variable and fixed rates ranging from 0.50% to 7.53%, due at various dates through November 15, 2024 $ 114,617 $ 174,263
Securities sold under agreements to repurchase 138,447 138,848
Federal funds purchased 92,700 57,000
Total borrowings $ 345,764 $ 370,111