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Note 1 - Nature of Business and Significant Accounting Policies - Impact of ASU 2016-13 (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss | $ 198 |  |  |  |
Less allowance for estimated losses on loans/leases | 78,721 | $ 84,376 | $ 84,376 | $ 36,001 | $ 39,847
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss |  | 183 |  |  |
Less allowance for estimated losses on loans/leases |  | 76,274 |  |  |
Off-Balance Sheet, Credit Loss, Liability |  | 9,117 |  |  |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss |  | 183 |  |  |
Less allowance for estimated losses on loans/leases |  | (8,102) |  |  |
Off-Balance Sheet, Credit Loss, Liability |  | 9,117 |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 29,889 | 35,421 | 35,421 | 16,072 | 16,420
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | (35,421) |  |  |
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 42,161 | 42,161 | 15,379 | 17,719
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | (42,161) |  |  |
Construction and Land Development [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 16,972 |  |  |  |
Multi-family |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 9,339 |  |  |  |
Multi-family | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 5,836 |  |  |
Multi-family | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 5,836 |  |  |
Direct financing leases |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 1,546 | 1,764 | 1,764 | 1,464 | 1,792
Direct financing leases | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | (1,764) |  |  |
1-4 family real estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 4,541 |  |  |  |
1-4 family real estate | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 5,042 |  |  |
1-4 family real estate | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 5,042 |  |  |
Residential real estate |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 3,732 | 3,732 | 1,948 | 2,557
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | (3,732) |  |  |
Consumer |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 930 | 1,298 | 1,298 |  |
Consumer | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 1,161 |  |  |
Consumer | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | (137) |  |  |
Installment and other consumer loans |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  |  | $ 1,298 | $ 1,138 | $ 1,359
C&I - revolving | Commercial Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 3,907 |  |  |  |
C&I - revolving | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 2,982 |  |  |
C&I - revolving | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 2,982 |  |  |
C&I - revolving | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 3,907 |  |  |  |
C&I - other | Commercial Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 25,982 |  |  |  |
C&I - other | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 29,130 |  |  |
C&I - other | Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 29,130 |  |  |
C&I - other | Direct financing leases |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 1,780 |  |  |  |
CRE - owner occupied | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 8,696 |  |  |
CRE - owner occupied | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 8,696 |  |  |
CRE - non owner occupied |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | 8,549 |  |  |  |
CRE - non owner occupied | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases | $ 8,549 |  |  |  |
CRE - non owner occupied | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 11,428 |  |  |
CRE - non owner occupied | Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 11,428 |  |  |
Construction Loans [Member] | Construction and Land Development [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 11,999 |  |  |
Construction Loans [Member] | Construction and Land Development [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | $ 11,999 |  |  |

X
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