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Note 8 - Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Loans held for investment | $ 19,784,702 | $ 19,375,955
Recorded investment | 174,153 | 169,161
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 23,920 | 86,041
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 71,912 | 20,860
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 6,389 | 4,050
Financial Asset, Past Due [Member] |  |
Loans held for investment | 276,373 | 280,112
Recorded investment | 174,153 | 169,161
Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 19,508,329 | 19,095,843
Commercial Portfolio Segment [Member] |  |
Loans held for investment | 3,194,724 | 3,098,004
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 10,976 | 25,164
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 26,970 | 275
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 6,389 | 2,590
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 98,871 | 87,796
Recorded investment | 54,536 | 59,767
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 3,095,853 | 3,010,208
Real Estate Construction Portfolio Segment [Member] |  |
Loans held for investment | 301,125 | 319,649
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 0 | 5,334
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 0 | 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 | 4,229 | 5,334
Recorded investment | 4,230 | 0
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 296,896 | 314,315
Commercial Real Estate Portfolio Segment [Member] |  |
Loans held for investment | 10,363,109 | 10,033,830
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 11,512 | 16,525
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 37,622 | 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 | 142,888 | 115,047
Recorded investment | 93,754 | 83,128
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 10,220,221 | 9,918,783
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans held for investment | 5,922,143 | 5,919,092
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 1,432 | 39,018
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 7,320 | 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 | 30,385 | 71,935
Recorded investment | 21,633 | 26,266
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 5,891,758 | 5,847,157
Installment and Other Loans [Member ] |  |
Loans held for investment | 3,601 | 5,380
Installment and Other Loans [Member ] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 0 | 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 | 0 | 0
Recorded investment | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | $ 3,601 | $ 5,380

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