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Note 8 - Dividends (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Paid Quarterly [Member]
Sep. 30, 2013
Paid Quarterly [Member]
May 31, 2013
Paid Quarterly [Member]
Mar. 31, 2013
Paid Quarterly [Member]
Dec. 31, 2012
Paid Quarterly [Member]
Sep. 30, 2012
Paid Quarterly [Member]
May 31, 2012
Paid Quarterly [Member]
Mar. 31, 2012
Paid Quarterly [Member]
Dec. 31, 2011
Paid Quarterly [Member]
Dec. 31, 2012
Special Dividend [Member]
Note 8 - Dividends (Details) [Line Items]                          
Payments of Dividends (in Dollars) $ 2.8 $ 18.7 $ 1.8                    
Common Stock, Dividends, Per Share, Cash Paid $ 0.083 $ 0.563 $ 0.053 $ 0.025 $ 0.025 $ 0.017 $ 0.017 $ 0.017 $ 0.017 $ 0.017 $ 0.013 $ 0.013 $ 0.50
Line of Credit Facility, Dividend Restrictions, Percentage of Net Income Limit 25.00%