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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

X

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Amortized cost, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

+ References

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