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Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | $ 6,504,941 | $ 6,366,303
Loans, variable rate of interest | 16,600,467 | 16,069,050
Loans, non-accrual | 132,251 | 121,797
Total | 23,237,659 | 22,557,150
Credit Commitments [Abstract] |  |
Outstanding commitments to extend credit | 15,000,000 |
Outstanding standby letters of credit | 722,000 |
Commercial [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 3,492,786 | 3,392,422
Loans, variable rate of interest | 10,968,453 | 10,759,780
Loans, non-accrual | 73,277 | 60,297
Total | 14,534,516 | 14,212,499
Commercial real estate [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 878,947 | 874,716
Loans, variable rate of interest | 4,074,459 | 3,715,491
Loans, non-accrual | 17,395 | 16,570
Total | 4,970,801 | 4,606,777
Loans to individuals [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 2,133,208 | 2,099,165
Loans, variable rate of interest | 1,557,555 | 1,593,779
Loans, non-accrual | 41,579 | 44,930
Total | $ 3,732,342 | $ 3,737,874

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- Definition 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 + Details
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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. + References 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 + Details
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