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Borrowed Funds (Schedule of Short-Term Borrowings) (Details) (USD $) In Thousands, unless otherwise specified | 6 Months Ended
--- | ---
Jun. 30, 2012 | Jun. 30, 2011
Short-term Debt [Line Items] |  |
Average amount outstanding during the quarter | $ 182 | $ 36,747
Maximum amount outstanding at any month end in the quarter | 5,125 | 43,799
Amount outstanding at quarter end | $ 107 | $ 32,374
At quarter end [Member] |  |
Short-term Debt [Line Items] |  |
Average interest rate | 4.75% | 0.23%
For the quarter [Member] |  |
Short-term Debt [Line Items] |  |
Average interest rate | 1.15% | 0.28%

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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 3 -Section VII -Subsection 2 + Details
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- Definition Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of short-term debt outstanding by type or by instrument at that time. + References Reference 1: 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(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19 -Subparagraph b -Article 5 + Details
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