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Note 12 - Fair Value Measurements (Details) - Financial Assets and Liabilities Measured On a Non-recurring Basis - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | $ 58,940 |  |  |  | $ 58,940 |  |  |  | $ 76,234 |  |  |
Asset Impairment Charges | 835 |  | $ 548 |  | 4,992 |  | $ 1,158 |  | 4,596 |  | $ 3,344 |
Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 41,173 |  |  |  | 41,173 |  |  |  | 49,554 |  |  |
Asset Impairment Charges | 575 |  | 547 |  | 4,180 |  | 564 |  | 3,958 |  | 6,069 |
Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 12,483 | [1] |  |  | 12,483 | [1] |  |  | 20,568 | [2] |  |
Asset Impairment Charges | 179 | [1] | (48) | [1] | 404 | [1] | 277 | [1] | 202 | [2] | (3,134) | [2]
Investments in Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 5,284 |  |  |  | 5,284 |  |  |  | 5,495 |  |  |
Asset Impairment Charges | 81 |  | 49 |  | 408 |  | 317 |  | 436 |  | 409 |
Equity Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  |  |  |  |  |  |  |  | 617 |  |  |
Commercial Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 7,866 |  |  |  | 7,866 |  |  |  | 3,774 |  |  |
Asset Impairment Charges | 575 |  |  |  | 3,380 |  | 17 |  | 17 |  | 5,731 |
Commercial Real Estate Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 19,950 |  |  |  | 19,950 |  |  |  | 25,029 |  |  |
Asset Impairment Charges |  |  | 515 |  | 654 |  | 515 |  | 3,914 |  | 125 |
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | $ 13,357 |  |  |  | 13,357 |  |  |  | 13,126 |  |  |
Asset Impairment Charges |  |  | $ 32 |  | $ 146 |  | $ 32 |  | 27 |  | $ 213 |
Construction - Other Loans [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  |  |  |  |  |  |  |  | 7,625 |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  |  |  |  |  |  |  |  | $ 617 |  |  |
Fair Value, Inputs, Level 1 [Member] | Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  | [1] |  |  |  | [1] |  |  |  | [2] |  |
Fair Value, Inputs, Level 1 [Member] | Equity Investments [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  |  |  |  |  |  |  |  | $ 617 |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | $ 8,247 |  |  |  | $ 8,247 |  |  |  | 16,458 |  |  |
Fair Value, Inputs, Level 2 [Member] | Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 8,247 | [1] |  |  | 8,247 | [1] |  |  | 16,458 | [2] |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 50,693 |  |  |  | 50,693 |  |  |  | 59,159 |  |  |
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 41,173 |  |  |  | 41,173 |  |  |  | 49,554 |  |  |
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 4,236 | [1] |  |  | 4,236 | [1] |  |  | 4,110 | [2] |  |
Fair Value, Inputs, Level 3 [Member] | Investments in Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 5,284 |  |  |  | 5,284 |  |  |  | 5,495 |  |  |
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 7,866 |  |  |  | 7,866 |  |  |  | 3,774 |  |  |
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | 19,950 |  |  |  | 19,950 |  |  |  | 25,029 |  |  |
Fair Value, Inputs, Level 3 [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring | $ 13,357 |  |  |  | $ 13,357 |  |  |  | 13,126 |  |  |
Fair Value, Inputs, Level 3 [Member] | Construction - Other Loans [Member] | Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Assets Fair Value Disclosure Nonrecurring |  |  |  |  |  |  |  |  | $ 7,625 |  |  |
[1] | Other real estate owned balance of $26.3 million in the condensed consolidated balance sheet is net of estimated disposal costs.
[2] | Other real estate owned balance of $31.5 million in the consolidated balance sheet is net of estimated disposal costs.

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