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Note 1 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of ASU 2016-13 (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Mar. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss |  | $ 174 |  |  |  |
Less allowance for estimated losses on loans/leases | $ 84,376 | 81,831 |  | $ 84,376 | $ 42,233 | $ 36,001
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 | 35,421 | 36,714 |  | 35,421 | 18,151 | 16,072
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 | 19,269 | 15,379
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 |  | 12,327 |  |  |  |
Multi-family |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 6,278 |  |  |  |
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 | 1,764 | 2,192 |  | 1,764 | 1,303 | 1,464
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 |  | 5,165 |  |  |  |
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 | 2,313 | 1,948
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 | $ 1,298 | 1,045 |  | $ 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 |  |  |  |  | $ 1,197 | $ 1,138
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 |  | 3,547 |  |  |  |
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 - other | Commercial Portfolio Segment [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 33,167 |  |  |  |
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 |  | 685 |  |  |  |
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 | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | 11,155 |  |  |  |
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] |  |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |  |
Less allowance for estimated losses on loans/leases |  | $ 12,327 |  |  |  |
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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