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Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	$ 6,788,786	$ 6,633,234
Loans, variable rate of interest	17,674,112	17,126,265
Loans, non-accrual	90,683	145,469
Total	24,553,581	23,904,968
Credit Commitments [Abstract]
Outstanding commitments to extend credit	14,100,000
Outstanding standby letters of credit	737,000
Commercial [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	3,604,024	3,558,563
Loans, variable rate of interest	11,960,951	11,135,075
Loans, non-accrual	58,434	110,131
Total	15,623,409	14,803,769
Commercial real estate [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	756,055	791,757
Loans, variable rate of interest	4,314,637	4,538,570
Loans, non-accrual	12,883	7,320
Total	5,083,575	5,337,647
Loans to individuals [Member]
Loan receivables disclosure [Abstract]
Loans, fixed rate of interest	2,428,707	2,282,914
Loans, variable rate of interest	1,398,524	1,452,620
Loans, non-accrual	19,366	28,018
Total	$ 3,846,597	$ 3,763,552

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

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- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-7

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Amount of loan with fixed rate of interest.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

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Amount of loan with variable or adjustable rate of interest.

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-Topic 310
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-Name Accounting Standards Codification
-Section 45
-Paragraph 2
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-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

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Unused amount of commitments to extend credit to customers.

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