Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Details)

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Borrowings (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Short-term borrowings      
Securities sold under agreements to repurchase $ 72,047 $ 54,270 $ 53,043
Other short-term borrowings   78,000  
Total short-term borrowings 72,047 132,270  
Maximum month-end outstanding balance 112,164 154,116  
Average outstanding balance during the period 94,006 91,993  
Average interest rate during the period 0.30% 0.31%  
Average interest rate at end of period 0.27% 0.28%  
Other short-term borrowings:      
Federal Funds purchased   38,000  
FHLB   $ 40,000