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Loans Past Due Status (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024 | Dec. 31, 2023
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | $ 29,990,897 | $ 29,990,897 | $ 29,216,218
Financing Receivable, Nonaccrual | 128,476 | 128,476 | 148,997
Nonaccrual Loans, Current Portion | $ 64,000 | $ 64,000 | $ 80,000
Percent of current nonaccrual loans | 50.00% | 50.00% | 53.00%
Financing Receivable, Nonaccrual, Interest Income | $ 0 | $ 0 | $ 0
Financing Receivable, Nonaccrual, No Allowance | 16,000 | 16,000 | 23,000
Commercial and Industrial Sector |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 10,258,899 | 10,258,899 | 9,731,555
Financing Receivable, Nonaccrual | 14,369 | 14,369 | 62,022
Commercial Real Estate Owner Occupied Portfolio [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 1,120,849 | 1,120,849 | 1,061,700
Financing Receivable, Nonaccrual | 9,285 | 9,285 | 1,394
Commercial And Business Lending [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 11,379,748 | 11,379,748 | 10,793,255
Financing Receivable, Nonaccrual | 23,654 | 23,654 | 63,416
Commercial Real Estate Investor Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 5,070,635 | 5,070,635 | 5,124,245
Financing Receivable, Nonaccrual | 18,913 | 18,913 | 0
Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,114,300 | 2,114,300 | 2,271,398
Financing Receivable, Nonaccrual | 15 | 15 | 6
Commercial Real Estate Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,184,934 | 7,184,934 | 7,395,644
Financing Receivable, Nonaccrual | 18,928 | 18,928 | 6
Commercial Portfolio Segment [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 18,564,683 | 18,564,683 | 18,188,898
Financing Receivable, Nonaccrual | 42,582 | 42,582 | 63,422
Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,803,083 | 7,803,083 | 7,864,891
Financing Receivable, Nonaccrual | 70,138 | 70,138 | 71,142
Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,708,946 | 2,708,946 | 2,256,162
Financing Receivable, Nonaccrual | 7,456 | 7,456 | 5,797
Home Equity Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 651,379 | 651,379 | 628,526
Financing Receivable, Nonaccrual | 8,231 | 8,231 | 8,508
Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 262,806 | 262,806 | 277,740
Financing Receivable, Nonaccrual | 70 | 70 | 128
Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 11,426,214 | 11,426,214 | 11,027,319
Financing Receivable, Nonaccrual | 85,894 | 85,894 | 85,574
Financial Asset, Not Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 29,806,662 | 29,806,662 | 28,983,708
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 | 10,242,844 | 10,242,844 | 9,663,587
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 | 1,109,355 | 1,109,355 | 1,059,948
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 | 11,352,200 | 11,352,200 | 10,723,536
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 | 5,036,091 | 5,036,091 | 5,086,117
Financial Asset, Not Past Due [Member] | Construction Loans [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,114,197 | 2,114,197 | 2,271,392
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 | 7,150,288 | 7,150,288 | 7,357,509
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 | 18,502,488 | 18,502,488 | 18,081,044
Financial Asset, Not Past Due [Member] | Residential Mortgage [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 7,719,316 | 7,719,316 | 7,780,304
Financial Asset, Not Past Due [Member] | Automobile Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,686,032 | 2,686,032 | 2,232,906
Financial Asset, Not Past Due [Member] | Home Equity Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 640,002 | 640,002 | 615,810
Financial Asset, Not Past Due [Member] | Other Consumer [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 258,824 | 258,824 | 273,644
Financial Asset, Not Past Due [Member] | Consumer Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 11,304,174 | 11,304,174 | 10,902,664
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 45,086 | 45,086 | 38,113
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 | 950 | 950 | 5,374
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 | 2,209 | 2,209 | 0
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 | 3,159 | 3,159 | 5,374
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 | 10,746 | 10,746 | 0
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 | 72 | 72 | 0
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 | 10,818 | 10,818 | 0
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 | 13,977 | 13,977 | 5,374
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 | 13,477 | 13,477 | 13,294
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 | 13,860 | 13,860 | 14,712
Financial Asset, 30 to 59 Days Past Due [Member] | Home Equity Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 2,507 | 2,507 | 3,500
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 | 1,265 | 1,265 | 1,233
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 | 31,109 | 31,109 | 32,739
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 3,566 | 3,566 | 23,712
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 | 262 | 262 | 191
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 | 0 | 358
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 | 262 | 262 | 549
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 | 0 | 18,697
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 | 16 | 16 | 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 | 16 | 16 | 18,697
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 | 278 | 278 | 19,246
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 | 153 | 153 | 152
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 | 1,598 | 1,598 | 2,674
Financial Asset, 60 to 89 Days Past Due [Member] | Home Equity Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 639 | 639 | 708
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 | 898 | 898 | 932
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 | 3,288 | 3,288 | 4,467
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 | 7,107 | 7,107 | 21,689
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 | 474 | 474 | 380
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 | 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 | 474 | 474 | 380
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 | 4,885 | 4,885 | 19,432
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 | 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 | 4,885 | 4,885 | 19,432
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 | 5,359 | 5,359 | 19,812
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 | 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 | 73
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home Equity Loan [Member] |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
Loans and Leases Receivable, Net of Deferred Income, Total | 0 | 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 | 1,748 | 1,748 | 1,803
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 | $ 1,748 | $ 1,748 | $ 1,876

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