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Note 15 - Financial Derivatives (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
May. 31, 2014 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Junior Subordinated Notes | $ 119,100,000 | $ 119,136,000 |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax |  | (598,000) | $ (2,397,000)
Notional Amount of Option Contract |  |  | 0
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Derivative Asset, Number of Instruments Held | 5 |  |
Derivative, Outstanding Notional Amount | $ 119,100,000 | 119,100,000 |
Derivative, Original Maturity | 10 years |  |
Derivative, Average Fixed Interest Rate | 2.61% |  |
Derivative, Average Variable Interest Rate | 0.53% |  |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax |  | (3,000,000) |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Derivative, Outstanding Notional Amount |  | $ 340,300,000 | 181,300,000
Derivative, Average Fixed Interest Rate |  | 4.69% |
Derivative, Average Variable Interest Rate |  | 3.51% |
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax |  | $ (1,300,000) | (489,000)
Derivative, Notional Amount at Origination |  | $ 347,200,000 | 347,200,000
Derivative, Average Basis Spread on Variable Rate |  | 3.21% |
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Expense [Member] | Cash Flow Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Net Accrued on Interest Rate Swaps |  | $ 2,800,000 | 1,500,000
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Income [Member] | Fair Value Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Net Accrued on Interest Rate Swaps |  | 3,300,000 | 1,300,000
Cash [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Collateral Already Posted, Aggregate Fair Value |  | 7,900,000 |
Negative Fair Value Member |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Notional Amount of Option Contract |  | 9,400,000 |
Open Option Contracts, Fair Value |  | (28,000) |
Sum of Spot and Forward Contract Notional Amount |  | 115,400,000 | 178,900,000
Negative Fair Value |  | 4,100,000 | 5,000,000
Positive Fair Value Member |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Sum of Spot and Forward Contract Notional Amount |  | 100,600,000 | 167,000,000
Positive Fair Value |  | $ 3,300,000 | $ 1,900,000
Minimum [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Derivative, Original Maturity |  | 2 years |
Maximum [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |
Note 15 - Financial Derivatives (Details) [Line Items] |  |  |
Derivative, Original Maturity |  | 8 years |

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