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Note 13 - Fair Value Measurements - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Assets, fair value disclosure | $ 1,506,204 |  |  |  | $ 1,506,204 |  |  |  | $ 1,275,998 |  |  |
Total Losses | 438 |  | $ 58 |  | 512 |  | $ 264 |  | (289) |  | $ 874 |
Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 56,280 |  |  |  | 56,280 |  |  |  | 53,297 |  |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 82,289 |  |  |  | 82,289 |  |  |  | 149,849 |  |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 1,423,871 |  |  |  | 1,423,871 |  |  |  | 1,125,965 |  |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 7,625 |  |  |  | 7,625 |  |  |  | 9,023 |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 44 |  |  |  | 44 |  |  |  | 184 |  |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 48,655 |  |  |  | 48,655 |  |  |  | 44,274 |  |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 5,750 |  |  |  | 5,750 |  |  |  | 6,850 |  |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 5,750 |  |  |  | 5,750 |  |  |  | 6,850 |  |  |
Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 25 |
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 42,566 |  |  |  | 42,566 |  |  |  | 37,769 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 42,566 |  |  |  | 42,566 |  |  |  | 37,769 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 25 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 11,731 |  |  |  | 11,731 |  |  |  | 4,733 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 11,731 |  |  |  | 11,731 |  |  |  | 4,733 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 25,085 |  |  |  | 25,085 |  |  |  | 26,186 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 25,085 |  |  |  | 25,085 |  |  |  | 26,186 |  |  |
Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 422 | [1] | (33) | [1] | 494 | [1] | 0 | [1] | (619) | [2] | 457 | [2]
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 11,968 | [1] |  |  | 11,968 | [1] |  |  | 13,366 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 | [1] |  |  | 0 | [1] |  |  | 0 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 7,625 | [1] |  |  | 7,625 | [1] |  |  | 9,023 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 4,343 | [1] |  |  | 4,343 | [1] |  |  | 4,343 | [2] |  |
Investments in Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 16 |  | $ 91 |  | 18 |  | $ 264 |  | 330 |  | $ 392 |
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 1,746 |  |  |  | 1,746 |  |  |  | 2,162 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Assets, fair value disclosure | $ 1,746 |  |  |  | $ 1,746 |  |  |  | $ 2,162 |  |  |
[1] | Other real estate owned balance of $11.3 million in the condensed consolidated balance sheet is net of estimated disposal costs.
[2] | Other real estate owned balance of $12.7 million in the Consolidated Balance Sheets is net of estimated disposal costs.

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