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Note 3 - Long-Term Debt (Details) (USD $) | 12 Months Ended | 1 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012 Special Dividend [Member] | Dec. 31, 2012 Credit Facility [Member] | Dec. 31, 2013 Minimum [Member] | Dec. 31, 2013 Maximum [Member]
Note 3 - Long-Term Debt (Details) [Line Items] |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  | $ 50,000,000 | $ 75,000,000
Line of Credit Facility, Amount Outstanding | 0 | 2,700,000 |  |  |  |  |
Letters of Credit Outstanding, Amount | 8,300,000 |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 41,700,000 |  |  |  |  |  |
Long-term Debt, Weighted Average Interest Rate |  |  |  |  | 1.05% |  |
Line of Credit Facility, Dividend Restrictions, Percentage of Net Income Limit | 25.00% |  |  |  |  |  |
Common Stock, Dividends, Per Share, Cash Paid (in Dollars per share) | $ 0.083 | $ 0.563 | $ 0.053 | $ 0.50 |  |  |

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- Definition Represents the dividend limit as a percentage of net income as required by the terms of the credit facility. + References No definition available. + Details
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: 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 borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + 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 Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + 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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