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Note 15 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Total at Fair Value | $ 73,493 |  | $ 37,981 |  |  |
Total Losses | 874 |  | 1,307 |  | $ 2,507 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value | 5,677 |  | 6,006 |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 67,816 |  | 31,975 |  |  |
Impaired Loans [Member] |  |  |  |  |  |
Total at Fair Value | 60,911 |  | 23,936 |  |  |
Total Losses | 25 |  | 322 |  | 1,550 |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 60,911 |  | 23,936 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Total at Fair Value | 18,097 |  | 2,813 |  |  |
Total Losses | 25 |  | 322 |  | 806 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 18,097 |  | 2,813 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Total at Fair Value | 31,459 |  | 9,444 |  |  |
Total Losses |  |  |  |  | 598 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 31,459 |  | 9,444 |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |  |  |
Total at Fair Value | 11,355 |  | 11,679 |  |  |
Total Losses |  |  |  |  | 146 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 11,355 |  | 11,679 |  |  |
Other Real Estate Owned [Member] |  |  |  |  |  |
Total at Fair Value | 9,999 | [1] | 10,378 | [2] |  |
Total Losses | 457 | [1] | 9 | [2] | 404 | [2]
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  | [1] |  | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value | 5,677 | [1] | 6,006 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | 4,322 | [1] | 4,372 | [2] |  |
Equity Investments [Member] |  |  |  |  |  |
Total at Fair Value | 2,583 |  | 3,667 |  |  |
Total Losses | 392 |  | 976 |  | $ 553 |
Equity Investments [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Equity Investments [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |
Total at Fair Value |  |  |  |  |  |
Equity Investments [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |
Total at Fair Value | $ 2,583 |  | $ 3,667 |  |  |
[1] | Other real estate owned balance of $9.4 million in the Consolidated Balance Sheets is net of estimated disposal costs.
[2] | Other real estate owned balance of $20.1 million in the condensed consolidated balance sheet is net of estimated disposal costs.

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