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Loans and Allowance for Credit Losses for Loans - Internal Loan Classification Risk by Loan Portfolio Class by Origination Year (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Financing Receivable, Credit Quality Indicator [Line Items]    
Total $ 50,136,728 $ 48,799,711
Gross loan charge-offs    
Total 127,708 215,112
Commercial and Industrial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 1,506,116 1,824,953
Year two, fiscal year before current fiscal year 1,351,742 854,030
Year three, two years before current fiscal year 712,288 772,815
Year four, three years before current fiscal year 591,475 492,961
Year five, four years before current fiscal year 356,942 250,075
More than five years before current fiscal year 639,274 524,794
Revolving Loans Amortized Cost Basis 5,764,130 5,155,993
Revolving Loans Converted to Term Loans 39,552 55,779
Total 10,961,519 9,931,400
Gross loan charge-offs    
Total 62,348 68,299
Commercial and Industrial | Pass    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 1,501,570 1,769,585
Year two, fiscal year before current fiscal year 1,333,581 828,087
Year three, two years before current fiscal year 676,608 703,962
Year four, three years before current fiscal year 511,649 476,091
Year five, four years before current fiscal year 343,565 246,992
More than five years before current fiscal year 500,972 392,834
Revolving Loans Amortized Cost Basis 5,438,418 4,804,095
Revolving Loans Converted to Term Loans 8,600 6,006
Total 10,314,963 9,227,652
Commercial and Industrial | Special Mention    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 1,475 30,755
Year two, fiscal year before current fiscal year 13,426 3,553
Year three, two years before current fiscal year 4,767 59,434
Year four, three years before current fiscal year 18,941 11,646
Year five, four years before current fiscal year 10,050 270
More than five years before current fiscal year 13,064 72,514
Revolving Loans Amortized Cost Basis 151,511 147,254
Revolving Loans Converted to Term Loans 6,964 10,762
Total 220,198 336,188
Commercial and Industrial | Substandard    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 3,071 24,613
Year two, fiscal year before current fiscal year 4,735 13,479
Year three, two years before current fiscal year 26,196 9,415
Year four, three years before current fiscal year 60,885 4,296
Year five, four years before current fiscal year 3,327 2,813
More than five years before current fiscal year 78,607 7,382
Revolving Loans Amortized Cost Basis 172,627 201,053
Revolving Loans Converted to Term Loans 23,988 39,011
Total 373,436 302,062
Commercial and Industrial | Doubtful    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 0 0
Year two, fiscal year before current fiscal year 0 8,911
Year three, two years before current fiscal year 4,717 4
Year four, three years before current fiscal year 0 928
Year five, four years before current fiscal year 0 0
More than five years before current fiscal year 46,631 52,064
Revolving Loans Amortized Cost Basis 1,574 3,591
Revolving Loans Converted to Term Loans 0 0
Total 52,922 65,498
Commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Total 29,243,982 29,644,958
Gross loan charge-offs    
Total 56,397 138,495
Commercial real estate | Commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 3,184,086 2,338,118
Year two, fiscal year before current fiscal year 1,992,021 3,433,126
Year three, two years before current fiscal year 2,898,380 5,988,114
Year four, three years before current fiscal year 5,392,757 4,400,609
Year five, four years before current fiscal year 3,913,173 2,604,959
More than five years before current fiscal year 8,522,187 6,937,081
Revolving Loans Amortized Cost Basis 818,250 749,597
Revolving Loans Converted to Term Loans 51,895 78,621
Total 26,772,749 26,530,225
Commercial real estate | Commercial real estate | Pass    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 3,179,469 2,097,314
Year two, fiscal year before current fiscal year 1,802,585 2,941,270
Year three, two years before current fiscal year 2,501,008 5,310,807
Year four, three years before current fiscal year 4,926,062 3,883,333
Year five, four years before current fiscal year 3,406,631 2,302,480
More than five years before current fiscal year 7,387,804 6,086,608
Revolving Loans Amortized Cost Basis 576,394 597,266
Revolving Loans Converted to Term Loans 20,952 78,621
Total 23,800,905 23,297,699
Commercial real estate | Commercial real estate | Special Mention    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 4,617 156,394
Year two, fiscal year before current fiscal year 90,876 380,852
Year three, two years before current fiscal year 218,532 289,669
Year four, three years before current fiscal year 154,578 192,614
Year five, four years before current fiscal year 112,038 55,739
More than five years before current fiscal year 305,609 327,732
Revolving Loans Amortized Cost Basis 116,595 141,164
Revolving Loans Converted to Term Loans 30,943 0
Total 1,033,788 1,544,164
Commercial real estate | Commercial real estate | Substandard    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 0 84,410
Year two, fiscal year before current fiscal year 98,560 107,944
Year three, two years before current fiscal year 175,780 387,638
Year four, three years before current fiscal year 312,117 288,906
Year five, four years before current fiscal year 365,371 236,927
More than five years before current fiscal year 818,034 520,858
Revolving Loans Amortized Cost Basis 125,261 11,167
Revolving Loans Converted to Term Loans 0 0
Total 1,895,123 1,637,850
Commercial real estate | Commercial real estate | Doubtful    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 0 0
Year two, fiscal year before current fiscal year 0 3,060
Year three, two years before current fiscal year 3,060 0
Year four, three years before current fiscal year 0 35,756
Year five, four years before current fiscal year 29,133 9,813
More than five years before current fiscal year 10,740 1,883
Revolving Loans Amortized Cost Basis 0 0
Revolving Loans Converted to Term Loans 0 0
Total 42,933 50,512
Commercial real estate | Construction    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 717,058 568,710
Year two, fiscal year before current fiscal year 526,130 680,260
Year three, two years before current fiscal year 225,289 346,587
Year four, three years before current fiscal year 308,008 102,776
Year five, four years before current fiscal year 80,240 25,228
More than five years before current fiscal year 58,977 47,665
Revolving Loans Amortized Cost Basis 498,119 1,284,863
Revolving Loans Converted to Term Loans 57,412 58,644
Total 2,471,233 3,114,733
Commercial real estate | Construction | Pass    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 712,797 545,597
Year two, fiscal year before current fiscal year 494,598 680,260
Year three, two years before current fiscal year 215,960 334,899
Year four, three years before current fiscal year 266,072 92,765
Year five, four years before current fiscal year 50,397 17,955
More than five years before current fiscal year 50,442 45,161
Revolving Loans Amortized Cost Basis 368,005 1,224,698
Revolving Loans Converted to Term Loans 17,474 58,644
Total 2,175,745 2,999,979
Commercial real estate | Construction | Special Mention    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 4,261 13,278
Year two, fiscal year before current fiscal year 31,142 0
Year three, two years before current fiscal year 9,329 664
Year four, three years before current fiscal year 2,859 5,069
Year five, four years before current fiscal year 28,205 0
More than five years before current fiscal year 0 2,504
Revolving Loans Amortized Cost Basis 78,494 16,691
Revolving Loans Converted to Term Loans 6,973 0
Total 161,263 38,206
Commercial real estate | Construction | Substandard    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year 0 9,835
Year two, fiscal year before current fiscal year 390 0
Year three, two years before current fiscal year 0 8,950
Year four, three years before current fiscal year 39,077 4,942
Year five, four years before current fiscal year 1,638 0
More than five years before current fiscal year 8,535 0
Revolving Loans Amortized Cost Basis 51,620 43,474
Revolving Loans Converted to Term Loans 32,965 0
Total 134,225 67,201
Commercial real estate | Construction | Doubtful    
Financing Receivable, Credit Quality Indicator [Line Items]    
Year one, current fiscal year   0
Year two, fiscal year before current fiscal year   0
Year three, two years before current fiscal year   2,074
Year four, three years before current fiscal year   0
Year five, four years before current fiscal year   7,273
More than five years before current fiscal year   0
Revolving Loans Amortized Cost Basis   0
Revolving Loans Converted to Term Loans   0
Total   9,347
Commercial and Industrial and Commercial Real Estate    
Gross loan charge-offs    
Year one, gross loan charge-offs 1,979 706
Year two, gross loan charge-offs 7,048 31,809
Year three, gross loan charge-offs 4,031 7,523
Year four, gross loan charge-offs 21,122 44,610
Year five, gross loan charge-offs 15,471 66,632
More than five years gross loan charge-offs 29,715 49,436
Revolving Loans Amortized Cost Basis 23,458 3,930
Revolving Loans Converted to Term Loans 15,921 2,148
Total $ 118,745 $ 206,794