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Note 6 - Changes in Accumulated Other Comprehensive Income by Component (Details) - Reclassifcation out of component of accumulated other comprehensive income: (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Note 6 - Changes in Accumulated Other Comprehensive Income by Component (Details) - Reclassifcation out of component of accumulated other comprehensive income: [Line Items]        
Realized gains (losses) on available-for sale securities $ 0 $ 163,000 $ 488,000 $ 663,000
Total before tax     (300,000) (431,000)
Amounts Reclassified From OCI [Member]
        
Note 6 - Changes in Accumulated Other Comprehensive Income by Component (Details) - Reclassifcation out of component of accumulated other comprehensive income: [Line Items]        
Realized gains (losses) on available-for sale securities (11,000) 162,000 472,000 663,000
Total before tax (11,000) 162,000 472,000 663,000
Less: Income tax (expense) benefit 4,000 [1] (57,000) [1] (172,000) [1] (232,000) [1]
Total reclassification related to available-for-sale securities (7,000) 105,000 300,000 431,000
Realized gains on cash flow hedges 44,000 [1] 12,000 47,000 57,000
Total before tax 44,000 12,000 47,000 57,000
Less: Income tax expense (16,000) (4,000) [1] (17,000) [1] (20,000) [1]
Total reclassification related to cash flow hedges $ 28,000 [1] $ 8,000 $ 30,000 $ 37,000
[1] Amounts in parentheses represent reductions to earnings in the statement of operations.