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Short Term Borrowings (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Lines Of Credit Facility |  |
Established Lines at Year-End | $ 60,000 | $ 60,000
Maximum Amount Outstanding | 29,000 | 24,300
Weighted average daily amounts of borrowings outstanding | 25,122 | 19,629
Notes Payable | $ 27,950 | $ 24,250
Weighted average interest rates on line of credit facility (As a percentage) | 1.43% | 1.44%
Weighted Average Interest Rate at Year-End | 1.40% | 1.33%

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- Definition The effective interest rate at the end of the reporting period. + 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),22(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, 22 -Article 5 + Details
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- Definition Maximum amount borrowed under the credit facility at any time during the period. + References No definition available. + Details
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