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Note L - Commitments and Contingent Liabilities (Details Textual) | Dec. 31, 2016 | Dec. 31, 2015 | Mar. 22, 2007
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Debt Instrument, Interest Rate, Stated Percentage | 2.64% | 2.19% | 6.58%
Minimum [Member] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 1.25% |  |
Maximum [Member] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.09% |  |
Fixed Rate Commitments [Member] | Minimum [Member] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.75% |  |
Fixed Rate Commitments [Member] | Maximum [Member] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 6.25% |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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