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Short-term Borrowings (Tables) | 12 Months Ended
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Dec. 31, 2012
Summary of Short-Term Borrowings | Short-term borrowings at December 31 were as follows:
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | Ending Balance |  |  | Average Balance |  |  | Average Rate |  |  | Ending Balance |  |  | Average Balance |  |  | Average Rate |  |  | Ending Balance |  |  | Average Balance |  |  | Average Rate |
|  | (dollars in thousands) |
Federal funds purchased |  | $ | 34,000 |  |  | $ | 47,727 |  |  |  | 0.27 | % |  | $ | 75,300 |  |  | $ | 15,642 |  |  |  | 0.26 | % |  | $ | 12,800 |  |  | $ | 40,322 |  |  |  | 0.26 | %
Borrowings from FHLB |  |  | 178,100 |  |  |  | 214,703 |  |  |  | 0.25 |  |  |  | 84,000 |  |  |  | 7,537 |  |  |  | 0.21 |  |  |  | 0 |  |  |  | 277,329 |  |  |  | 0.39 |
Securities sold under agreements to repurchase |  |  | 144,127 |  |  |  | 139,766 |  |  |  | 0.28 |  |  |  | 153,477 |  |  |  | 155,551 |  |  |  | 0.43 |  |  |  | 170,563 |  |  |  | 165,945 |  |  |  | 0.47 |
Treasury, tax and loan note option |  |  | 0 |  |  |  | 0 |  |  |  | 0.00 |  |  |  | 0 |  |  |  | 4,134 |  |  |  | 0.00 |  |  |  | 4,498 |  |  |  | 4,482 |  |  |  | 0.00 |
Total |  | $ | 356,227 |  |  | $ | 402,196 |  |  |  | 0.27 |  |  | $ | 312,777 |  |  | $ | 182,864 |  |  |  | 0.40 |  |  | $ | 187,861 |  |  | $ | 488,078 |  |  |  | 0.40 |
Maximum total at any month-end |  | $ | 486,144 |  |  |  |  |  |  |  |  |  |  | $ | 312,777 |  |  |  |  |  |  |  |  |  |  | $ | 1,000,753 |  |  |  |  |  |  |  |  |
Weighted average rate at year-end |  |  |  |  |  |  |  |  |  |  | 0.25 | % |  |  |  |  |  |  |  |  |  |  | 0.28 | % |  |  |  |  |  |  |  |  |  |  | 0.43 | %
Interest Expense on Short-Term Borrowings | Interest expense on short-term borrowings for the years ended December 31 is detailed below:
|  | 2012 |  |  | 2011 |  |  | 2010 |
|  | (dollars in thousands) |
Federal funds purchased |  | $ | 128 |  |  | $ | 41 |  |  | $ | 105 |
Borrowings from FHLB |  |  | 545 |  |  |  | 16 |  |  |  | 1,069 |
Securities sold under agreements to repurchase |  |  | 397 |  |  |  | 671 |  |  |  | 774 |
Total interest on short-term borrowings |  | $ | 1,070 |  |  | $ | 728 |  |  | $ | 1,948 |

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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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