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Note 11 - Fair Value Measurements (Details) - Assets and Liabilities Measured at Fair Value On a Recurring Basis - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Investment securities available for sale:
Available for Sale Securities	$ 559,738
Loans Held for Sale Securities [Member]
Investment securities available for sale:
Available for Sale Securities	132,683	$ 44,317
Mortgage Banking Derivative [Member]
Investment securities available for sale:
Available for Sale Securities	165	146
Interest Rate Swap [Member]
Investment securities available for sale:
Available for Sale Securities	3,181	426,806
US Government Agencies Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	59,703	29,894
Residential Mortgage Backed Securities [Member]
Investment securities available for sale:
Available for Sale Securities	255,663	240,320
US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	92,838	111,712
Corporate Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	15,041
Equity Securities [Member]
Investment securities available for sale:
Available for Sale Securities	464	417
Fair Value, Inputs, Level 1 [Member]
Investment securities available for sale:
Available for Sale Securities	245
Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]
Investment securities available for sale:
Available for Sale Securities		198
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Investment securities available for sale:
Available for Sale Securities	245	198
Fair Value, Inputs, Level 2 [Member]
Investment securities available for sale:
Available for Sale Securities	559,109
Fair Value, Inputs, Level 2 [Member] | Loans Held for Sale Securities [Member]
Investment securities available for sale:
Available for Sale Securities	132,683	44,317
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]
Investment securities available for sale:
Available for Sale Securities	3,181	426,243
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	59,703	29,894
Fair Value, Inputs, Level 2 [Member] | Residential Mortgage Backed Securities [Member]
Investment securities available for sale:
Available for Sale Securities	255,663	240,320
Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	92,838	111,712
Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member]
Investment securities available for sale:
Available for Sale Securities	15,041
Fair Value, Inputs, Level 3 [Member]
Investment securities available for sale:
Available for Sale Securities	384
Fair Value, Inputs, Level 3 [Member] | Mortgage Banking Derivative [Member]
Investment securities available for sale:
Available for Sale Securities	165	146
Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]
Investment securities available for sale:
Available for Sale Securities		365
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Investment securities available for sale:
Available for Sale Securities	$ 219	$ 219

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- Definition

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a recurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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