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Note 13 - Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Assets, fair value disclosure |  | $ 1,287,058 |  | $ 1,160,854 |
Total Losses |  | 0 | $ 71 | 1,172 | $ 7,836
Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 44,748 |  | 28,446 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 147,488 |  | 22,319 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 1,139,546 |  | 1,138,512 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 24 |  | 23 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 44,748 |  | 28,446 |
Impaired Loans [Member] |  |  |  |  |
Total Losses |  | 0 | 0 | 1,012 | 7,012
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 39,532 |  | 22,905 |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 39,532 |  | 22,905 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |
Total Losses |  | 0 | 0 | 1,012 | 7,012
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 19,688 |  | 4,327 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 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 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 19,688 |  | 4,327 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Total Losses |  | 0 | 0 | 0 | 0
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 13,665 |  | 13,335 |
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 |
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 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 13,665 |  | 13,335 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |  |  |  |
Assets, fair value disclosure |  | 6,179 |  | 5,243 |
Total Losses |  | 0 | 0 | 0 | 0
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Assets, fair value disclosure |  | 6,179 |  | 5,243 |
Other Real Estate Owned [Member] |  |  |  |  |
Total Losses | [1] | 0 | 0 | 17 | 717
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure | [1] | 4,269 |  | 4,589 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure | [1] | 0 |  | 0 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure | [1] | 0 |  | 0 |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure | [1] | 4,269 |  | 4,589 |
Investments in Venture Capital [Member] |  |  |  |  |
Total Losses |  | 0 | $ 71 | 143 | $ 107
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 947 |  | 952 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | 0 |  | 0 |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |
Assets, fair value disclosure |  | $ 947 |  | $ 952 |
[1] | Other real estate owned balance of $4.1 million in the Consolidated Balance Sheets is net of estimated disposal costs.

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