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Note 4 - Debt and Equity Securities (Details) - Credit Loss Component Recognized in Earnings on Debt Securities for Which a Portion of OTTI Was Recognized in AOCI (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Credit Loss Component Recognized in Earnings on Debt Securities for Which a Portion of OTTI Was Recognized in AOCI [Abstract]    
Balance $ 3,738us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld $ 3,738us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Balance $ 3,738us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld $ 3,738us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld