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Note 4 - Loans and the Allowance for Credit Losses - Composition of Loan Portfolio (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process |  | $ 8,109,161 | $ 6,838,351
Net deferred fees |  | (9,472) | (9,729)
Loans receivable |  | 8,099,689 | 6,828,622
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process | [1] | 1,472,734 | 1,299,428
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process |  | 5,795,228 | 4,741,590
Commercial Construction Portfolio Segment [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process |  | 574,139 | 540,178
Residential Portfolio Segment [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process |  | 264,748 | 255,269
Consumer Portfolio Segment [Member] |  |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process |  | $ 2,312 | $ 1,886
[1] | Included in commercial loans as of December 31, 2022 and December 31, 2021 were Paycheck Protection Program (“PPP”) loans of $11.4 million and $93.1 million, respectively. These loans are 100% federally guaranteed and currently not subject to any allocation of allowance for credit losses.

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