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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 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 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 on available-for sale securities     $ 488,000 $ 501,000
Total before tax     (309,000) (326,000)
Less: Income tax expense        [1]  
Less: Income tax (expense) benefit        [1]  
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 on available-for sale securities 1,000 45,000 483,000 501,000
Total before tax 1,000 45,000 483,000 501,000
Less: Income tax expense    [1] (16,000) [1] (174,000) [1] (175,000) [1]
Total reclassification related to available-for-sale securities 1,000 29,000 309,000 326,000
Realized gains and losses on cash flow hedges (23,000) [1] 42,000 3,000 45,000
Total before tax (23,000) 42,000 3,000 45,000
Less: Income tax (expense) benefit 8,000 (15,000) [1] (1,000) [1] (16,000) [1]
Total reclassification related to cash flow hedges $ (15,000) [1] $ 27,000 $ 2,000 $ 29,000
[1] Amount in parentheses represent reduction to earnings in the statement of operations.