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Note 8 - Loans - Aging of Loan Portfolio (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Loans held for investment | $ 19,357,524 | $ 19,548,140
Recorded investment | 107,270 | 66,681
Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 8,449 | 124,698
Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 24,744 | 38,941
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 3,443 | 7,157
Financial Asset, Past Due [Member] |  |
Loans held for investment | 143,906 | 237,477
Recorded investment | 107,270 | 66,681
Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 19,213,618 | 19,310,663
Commercial Portfolio Segment [Member] |  |
Loans held for investment | 3,090,763 | 3,305,048
Commercial Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 6,567 | 11,771
Commercial Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 5,532 | 7,770
Commercial Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 2,207 | 508
Commercial Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 18,381 | 34,453
Recorded investment | 4,075 | 14,404
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 3,072,382 | 3,270,595
Real Estate Construction Portfolio Segment [Member] |  |
Loans held for investment | 356,978 | 422,647
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 0 | 25,389
Real Estate Construction Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 0 | 22,998
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 | 22,998 | 56,123
Recorded investment | 22,998 | 7,736
Real Estate Construction Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 333,980 | 366,524
Commercial Real Estate Portfolio Segment [Member] |  |
Loans held for investment | 9,886,030 | 9,729,581
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 925 | 27,900
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 12,702 | 1,503
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Loans held for investment | 1,236 | 6,649
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Past Due [Member] |  |
Loans held for investment | 74,948 | 68,082
Recorded investment | 60,085 | 32,030
Commercial Real Estate Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 9,811,082 | 9,661,499
Residential Mortgage and Equity Lines Portfolio Segment [Member] |  |
Loans held for investment | 6,017,479 | 6,084,666
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 954 | 59,606
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |
Loans held for investment | 6,510 | 6,670
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 | 27,576 | 78,787
Recorded investment | 20,112 | 12,511
Residential Mortgage and Equity Lines Portfolio Segment [Member] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | 5,989,903 | 6,005,879
Installment and Other Loans [Member ] |  |
Loans held for investment | 6,274 | 6,198
Installment and Other Loans [Member ] | Financial Asset, 30 to 59 Days Past Due [Member] |  |
Loans held for investment | 3 | 32
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 | 3 | 32
Recorded investment | 0 | 0
Installment and Other Loans [Member ] | Financial Asset, Not Past Due [Member] |  |
Loans held for investment | $ 6,271 | $ 6,166

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