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Note 11 - Derivative Financial Instruments (Details) - Effect of Derivative Instruments on the Consolidated Statements of Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Financial Derivatives:    
Financial Derivatives $ (1,308)us-gaap_DerivativeGainLossOnDerivativeNet [1] $ (1,042)us-gaap_DerivativeGainLossOnDerivativeNet [1]
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]    
Financial Derivatives:    
Financial Derivatives (1,254)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember		 (1,014)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_NondesignatedMember
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]    
Financial Derivatives:    
Financial Derivatives $ (54)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember		 $ (28)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeByNatureAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
[1] Net gains and losses are recorded as part of "Net gain/loss from fair value adjustments" in the Consolidated Statements of Income.