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Note 8 - Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Loans held for investment | $ 19,353,003 | $ 19,375,955
Recorded investment | 154,626 | 169,161
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 178,144 | 86,041
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 18,843 | 20,860
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 595 | 4,050
Financial Asset, Past Due [Member] |  |
Loans held for investment | 352,208 | 280,112
Recorded investment | 154,626 | 169,161
Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 19,000,795 | 19,095,843
Commercial Portfolio Segment [Member] |  |
Loans held for investment | 2,998,423 | 3,098,004
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 71,018 | 25,164
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 294 | 275
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 595 | 2,590
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 125,269 | 87,796
Recorded investment | 53,362 | 59,767
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 2,873,154 | 3,010,208
Real Estate Construction Portfolio Segment [Member] |  |
Loans held for investment | 332,729 | 319,649
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 13,806 | 5,334
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 7,813 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 21,619 | 5,334
Recorded investment | 0 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 311,110 | 314,315
Commercial Real Estate Portfolio Segment [Member] |  |
Loans held for investment | 10,160,934 | 10,033,830
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 57,707 | 16,525
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 7,832 | 13,934
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 0 | 1,460
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 142,341 | 115,047
Recorded investment | 76,802 | 83,128
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 10,018,593 | 9,918,783
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans held for investment | 5,854,748 | 5,919,092
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 35,413 | 39,018
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 2,904 | 6,651
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 0 | 0
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 62,779 | 71,935
Recorded investment | 24,462 | 26,266
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 5,791,969 | 5,847,157
Installment and Other Loans [Member ] |  |
Loans held for investment | 6,169 | 5,380
Installment and Other Loans [Member ] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 200 | 0
Installment and Other Loans [Member ] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 200 | 0
Recorded investment | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | $ 5,969 | $ 5,380

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