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Note 6 - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - Reclassifcation Out of Component of Accumulated Other Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Note 6 - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - Reclassifcation Out of Component of Accumulated Other Comprehensive Income [Line Items]        
Realized gains (losses) on available-for sale securities   $ 0   $ 500
Amounts Reclassified From OCI [Member]
        
Note 6 - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - Reclassifcation Out of Component of Accumulated Other Comprehensive Income [Line Items]        
Realized gains (losses) on available-for sale securities    [1] (11) [1]    [1] 472 [1]
Less: Income tax (expense) benefit    [1] 4 [1]    [1] (172) [1]
Total reclassification related to available-for-sale securities    [1] (7) [1]    [1] 300 [1]
Realized gains and (losses) on cash flow hedges (14) [1] 44 [1] 15 47
Less: Income tax expense    [1] (16) [1]    [1] (17) [1]
Total reclassification related to cash flow hedges $ (14) [1] $ 28 [1] $ 15 [1] $ 30 [1]
[1] Amounts in parentheses represent reductions to earnings in the statement of operations.