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Note 5 - Loans and the Allowance for Credit Losses - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Gross loans | $ 8,141,176 | $ 8,109,161
Net deferred loan fees | (9,057) | (9,472)
Total loans receivable | 8,132,119 | 8,099,689
Commercial Portfolio Segment [Member] |  |
Gross loans | 1,414,226 | 1,472,734
Commercial Real Estate Portfolio Segment [Member] |  |
Gross loans | 5,835,880 | 5,795,228
Commercial Construction Portfolio Segment [Member] |  |
Gross loans | 630,469 | 574,139
Residential Portfolio Segment [Member] |  |
Gross loans | 259,166 | 264,748
Consumer Portfolio Segment [Member] |  |
Gross loans | $ 1,435 | $ 2,312

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