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Loans Past Due Status (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 30,294,127 |  | $ 29,768,586
Financing Receivable, Nonaccrual | 134,808 |  | 123,260
Nonaccrual Loans, Current Portion | $ 44,000 |  | $ 52,000
Percent of current nonaccrual loans | 32.00% |  | 42.00%
Financing Receivable, Nonaccrual, Interest Income | $ 0 | $ 0 |
Financing Receivable, Nonaccrual, No Allowance | 23,000 |  | $ 24,000
Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,925,769 |  | 10,573,741
Financing Receivable, Nonaccrual | 12,898 |  | 19,084
Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,118,363 |  | 1,143,741
Financing Receivable, Nonaccrual | 1,501 |  | 1,501
Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 12,044,132 |  | 11,717,483
Financing Receivable, Nonaccrual | 14,399 |  | 20,585
Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 5,597,442 |  | 5,227,975
Financing Receivable, Nonaccrual | 31,689 |  | 16,705
Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,809,054 |  | 1,982,632
Financing Receivable, Nonaccrual | 125 |  | 30
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,406,496 |  | 7,210,607
Financing Receivable, Nonaccrual | 31,814 |  | 16,735
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 19,450,628 |  | 18,928,090
Financing Receivable, Nonaccrual | 46,213 |  | 37,320
Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 6,999,654 |  | 7,047,541
Financing Receivable, Nonaccrual | 72,455 |  | 70,038
Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,878,765 |  | 2,810,220
Financing Receivable, Nonaccrual | 7,692 |  | 7,402
Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 654,140 |  | 664,252
Financing Receivable, Nonaccrual | 8,275 |  | 8,378
Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 310,940 |  | 318,483
Financing Receivable, Nonaccrual | 173 |  | 122
Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,843,499 |  | 10,840,496
Financing Receivable, Nonaccrual | 88,595 |  | 85,941
Financial Asset, Not Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 30,112,848 |  | 29,565,335
Financial Asset, Not Past Due [Member] | Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,904,616 |  | 10,552,756
Financial Asset, Not Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,115,706 |  | 1,140,607
Financial Asset, Not Past Due [Member] | Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 12,020,322 |  | 11,693,363
Financial Asset, Not Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 5,563,289 |  | 5,174,879
Financial Asset, Not Past Due [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,808,929 |  | 1,982,581
Financial Asset, Not Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,372,218 |  | 7,157,460
Financial Asset, Not Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 19,392,540 |  | 18,850,823
Financial Asset, Not Past Due [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 6,913,632 |  | 6,962,610
Financial Asset, Not Past Due [Member] | Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,858,551 |  | 2,787,967
Financial Asset, Not Past Due [Member] | Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 642,260 |  | 651,248
Financial Asset, Not Past Due [Member] | Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 305,865 |  | 312,687
Financial Asset, Not Past Due [Member] | Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,720,308 |  | 10,714,512
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 38,827 |  | 40,961
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 6,934 |  | 899
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,156 |  | 1,533
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 8,090 |  | 2,432
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,463 |  | 5,117
Financial Asset, 30 to 59 Days Past Due [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 21
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,463 |  | 5,138
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,553 |  | 7,570
Financial Asset, 30 to 59 Days Past Due [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 13,257 |  | 14,731
Financial Asset, 30 to 59 Days Past Due [Member] | Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,858 |  | 12,588
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,829 |  | 4,181
Financial Asset, 30 to 59 Days Past Due [Member] | Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,330 |  | 1,892
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 28,274 |  | 33,391
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 4,608 |  | 35,841
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 806 |  | 361
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 101
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 806 |  | 462
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 31,274
Financial Asset, 60 to 89 Days Past Due [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 31,274
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 806 |  | 31,736
Financial Asset, 60 to 89 Days Past Due [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 311 |  | 162
Financial Asset, 60 to 89 Days Past Due [Member] | Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,664 |  | 2,262
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 777 |  | 445
Financial Asset, 60 to 89 Days Past Due [Member] | Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,050 |  | 1,236
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 3,802 |  | 4,105
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 3,036 |  | 3,189
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 515 |  | 642
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 515 |  | 642
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 515 |  | 642
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Line of Credit [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 |  | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,521 |  | 2,547
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 2,521 |  | $ 2,547

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