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Loans and Allowance for Credit Losses, Loans by Portfolio Type (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | $ 6,339,409 | $ 6,603,265
Loans, variable rate of interest | 14,837,600 | 13,468,356
Loans, non-accrual | 114,139 | 134,059
Total | 21,291,148 | 20,205,680
Credit Commitments [Abstract] |  |
Outstanding commitments to extend credit | 13,500,000 |
Outstanding standby letters of credit | 701,000 |
Commercial [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 3,410,376 | 3,360,117
Loans, variable rate of interest | 10,113,713 | 9,072,244
Loans, non-accrual | 54,608 | 74,104
Total | 13,578,697 | 12,506,465
Commercial real estate [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 874,850 | 929,015
Loans, variable rate of interest | 3,220,359 | 2,888,048
Loans, non-accrual | 10,939 | 14,262
Total | 4,106,148 | 3,831,325
Paycheck Protection Program [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 43,140 | 276,341
Loans, variable rate of interest | 0 | 0
Loans, non-accrual | 0 | 0
Total | 43,140 | 276,341
Loans to individuals [Member] |  |
Loan receivables disclosure [Abstract] |  |
Loans, fixed rate of interest | 2,011,043 | 2,037,792
Loans, variable rate of interest | 1,503,528 | 1,508,064
Loans, non-accrual | 48,592 | 45,693
Total | $ 3,563,163 | $ 3,591,549

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5111-111524 + Details
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