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Note 8 - Loans - Components of Loans in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | ---
Loans held for investment | $ 19,353,003 | $ 19,375,955 |  |
Less: Allowance for loan losses | (173,936) | (161,765) | $ (154,589) | $ (154,562)
Unamortized deferred loan fees, net | (11,657) | (10,541) |  |
Loans held for investment, net | 19,167,410 | 19,203,649 |  |
Loans held for sale | 11,759 | 0 |  |
Commercial Portfolio Segment [Member] |  |  |  |
Loans held for investment | 2,998,423 | 3,098,004 |  |
Less: Allowance for loan losses | (69,023) | (57,796) | (51,290) | (53,791)
Loans held for sale | 11,700 |  |  |
Real Estate Construction Portfolio Segment [Member] |  |  |  |
Loans held for investment | 332,729 | 319,649 |  |
Less: Allowance for loan losses | (8,540) | (8,185) | (8,539) | (8,180)
Commercial Real Estate Portfolio Segment [Member] |  |  |  |
Loans held for investment | 10,160,934 | 10,033,830 |  |
Less: Allowance for loan losses | (80,901) | (79,597) | (77,049) | (74,428)
Residential Portfolio Segment [Member] |  |  |  |
Loans held for investment | 5,623,564 | 5,689,097 |  |
Equity Lines Portfolio Segment [Member] |  |  |  |
Loans held for investment | 231,184 | 229,995 |  |
Installment and Other Loans [Member ] |  |  |  |
Loans held for investment | 6,169 | 5,380 |  |
Less: Allowance for loan losses | $ (17) | $ (6) | $ (10) | $ (23)

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