v3.26.1
Loans and Allowance for Credit Losses for Loans - Internal Loan Classification Risk by Loan Portfolio Class by Origination Year (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]          
Total $ 52,467,251   $ 52,467,251   $ 50,136,728
Gross loan charge-offs          
Total 27,626 $ 42,071 47,427 $ 86,090  
Commercial and industrial          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 987,205   987,205   1,506,116
Year two, fiscal year before current fiscal year 1,335,766   1,335,766   1,351,742
Year three, two years before current fiscal year 1,124,104   1,124,104   712,288
Year four, three years before current fiscal year 598,118   598,118   591,475
Year five, four years before current fiscal year 556,892   556,892   356,942
More than five years before current fiscal year 960,500   960,500   639,274
Revolving Loans Amortized Cost Basis 6,357,982   6,357,982   5,764,130
Revolving Loans Converted to Term Loans 40,675   40,675   39,552
Total 11,961,242   11,961,242   10,961,519
Gross loan charge-offs          
Total 9,838 25,189 12,620 53,645  
Commercial and industrial | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 983,702   983,702   1,501,570
Year two, fiscal year before current fiscal year 1,324,496   1,324,496   1,333,581
Year three, two years before current fiscal year 1,066,910   1,066,910   676,608
Year four, three years before current fiscal year 536,920   536,920   511,649
Year five, four years before current fiscal year 486,773   486,773   343,565
More than five years before current fiscal year 820,951   820,951   500,972
Revolving Loans Amortized Cost Basis 6,051,460   6,051,460   5,438,418
Revolving Loans Converted to Term Loans 6,532   6,532   8,600
Total 11,277,744   11,277,744   10,314,963
Commercial and industrial | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   1,475
Year two, fiscal year before current fiscal year 2,202   2,202   13,426
Year three, two years before current fiscal year 15,738   15,738   4,767
Year four, three years before current fiscal year 25,977   25,977   18,941
Year five, four years before current fiscal year 12,704   12,704   10,050
More than five years before current fiscal year 17,989   17,989   13,064
Revolving Loans Amortized Cost Basis 115,345   115,345   151,511
Revolving Loans Converted to Term Loans 7,156   7,156   6,964
Total 197,111   197,111   220,198
Commercial and industrial | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 3,503   3,503   3,071
Year two, fiscal year before current fiscal year 9,068   9,068   4,735
Year three, two years before current fiscal year 41,456   41,456   26,196
Year four, three years before current fiscal year 31,125   31,125   60,885
Year five, four years before current fiscal year 57,415   57,415   3,327
More than five years before current fiscal year 79,516   79,516   78,607
Revolving Loans Amortized Cost Basis 190,335   190,335   172,627
Revolving Loans Converted to Term Loans 26,987   26,987   23,988
Total 439,405   439,405   373,436
Commercial and industrial | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   0
Year two, fiscal year before current fiscal year 0   0   0
Year three, two years before current fiscal year 0   0   4,717
Year four, three years before current fiscal year 4,096   4,096   0
Year five, four years before current fiscal year 0   0   0
More than five years before current fiscal year 42,044   42,044   46,631
Revolving Loans Amortized Cost Basis 842   842   1,574
Revolving Loans Converted to Term Loans 0   0   0
Total 46,982   46,982   52,922
Commercial real estate          
Financing Receivable, Credit Quality Indicator [Line Items]          
Total 30,348,835   30,348,835   29,243,982
Gross loan charge-offs          
Total 14,434 $ 14,623 28,190 $ 28,046  
Commercial real estate | Commercial real estate          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 2,673,192   2,673,192   3,184,086
Year two, fiscal year before current fiscal year 3,213,865   3,213,865   1,992,021
Year three, two years before current fiscal year 1,703,455   1,703,455   2,898,380
Year four, three years before current fiscal year 2,646,443   2,646,443   5,392,757
Year five, four years before current fiscal year 5,311,555   5,311,555   3,913,173
More than five years before current fiscal year 11,612,840   11,612,840   8,522,187
Revolving Loans Amortized Cost Basis 672,237   672,237   818,250
Revolving Loans Converted to Term Loans 40,139   40,139   51,895
Total 27,873,726   27,873,726   26,772,749
Commercial real estate | Commercial real estate | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 2,671,281   2,671,281   3,179,469
Year two, fiscal year before current fiscal year 3,202,290   3,202,290   1,802,585
Year three, two years before current fiscal year 1,529,892   1,529,892   2,501,008
Year four, three years before current fiscal year 2,313,592   2,313,592   4,926,062
Year five, four years before current fiscal year 4,706,311   4,706,311   3,406,631
More than five years before current fiscal year 10,069,598   10,069,598   7,387,804
Revolving Loans Amortized Cost Basis 482,388   482,388   576,394
Revolving Loans Converted to Term Loans 9,526   9,526   20,952
Total 24,984,878   24,984,878   23,800,905
Commercial real estate | Commercial real estate | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 1,911   1,911   4,617
Year two, fiscal year before current fiscal year 7,637   7,637   90,876
Year three, two years before current fiscal year 139,063   139,063   218,532
Year four, three years before current fiscal year 181,535   181,535   154,578
Year five, four years before current fiscal year 254,143   254,143   112,038
More than five years before current fiscal year 374,659   374,659   305,609
Revolving Loans Amortized Cost Basis 92,553   92,553   116,595
Revolving Loans Converted to Term Loans 30,613   30,613   30,943
Total 1,082,114   1,082,114   1,033,788
Commercial real estate | Commercial real estate | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   0
Year two, fiscal year before current fiscal year 3,938   3,938   98,560
Year three, two years before current fiscal year 34,500   34,500   175,780
Year four, three years before current fiscal year 151,316   151,316   312,117
Year five, four years before current fiscal year 351,101   351,101   365,371
More than five years before current fiscal year 1,122,826   1,122,826   818,034
Revolving Loans Amortized Cost Basis 97,296   97,296   125,261
Revolving Loans Converted to Term Loans 0   0   0
Total 1,760,977   1,760,977   1,895,123
Commercial real estate | Commercial real estate | Doubtful          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   0
Year two, fiscal year before current fiscal year 0   0   0
Year three, two years before current fiscal year 0   0   3,060
Year four, three years before current fiscal year 0   0   0
Year five, four years before current fiscal year 0   0   29,133
More than five years before current fiscal year 45,757   45,757   10,740
Revolving Loans Amortized Cost Basis 0   0   0
Revolving Loans Converted to Term Loans 0   0   0
Total 45,757   45,757   42,933
Commercial real estate | Construction          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 339,346   339,346   717,058
Year two, fiscal year before current fiscal year 741,344   741,344   526,130
Year three, two years before current fiscal year 367,391   367,391   225,289
Year four, three years before current fiscal year 215,951   215,951   308,008
Year five, four years before current fiscal year 249,234   249,234   80,240
More than five years before current fiscal year 125,402   125,402   58,977
Revolving Loans Amortized Cost Basis 396,555   396,555   498,119
Revolving Loans Converted to Term Loans 39,886   39,886   57,412
Total 2,475,109   2,475,109   2,471,233
Commercial real estate | Construction | Pass          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 339,346   339,346   712,797
Year two, fiscal year before current fiscal year 736,849   736,849   494,598
Year three, two years before current fiscal year 350,644   350,644   215,960
Year four, three years before current fiscal year 215,951   215,951   266,072
Year five, four years before current fiscal year 208,217   208,217   50,397
More than five years before current fiscal year 102,005   102,005   50,442
Revolving Loans Amortized Cost Basis 331,133   331,133   368,005
Revolving Loans Converted to Term Loans 0   0   17,474
Total 2,284,145   2,284,145   2,175,745
Commercial real estate | Construction | Special Mention          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   4,261
Year two, fiscal year before current fiscal year 4,495   4,495   31,142
Year three, two years before current fiscal year 16,358   16,358   9,329
Year four, three years before current fiscal year 0   0   2,859
Year five, four years before current fiscal year 1,160   1,160   28,205
More than five years before current fiscal year 13,219   13,219   0
Revolving Loans Amortized Cost Basis 57,639   57,639   78,494
Revolving Loans Converted to Term Loans 6,895   6,895   6,973
Total 99,766   99,766   161,263
Commercial real estate | Construction | Substandard          
Financing Receivable, Credit Quality Indicator [Line Items]          
Year one, current fiscal year 0   0   0
Year two, fiscal year before current fiscal year 0   0   390
Year three, two years before current fiscal year 389   389   0
Year four, three years before current fiscal year 0   0   39,077
Year five, four years before current fiscal year 39,857   39,857   1,638
More than five years before current fiscal year 10,178   10,178   8,535
Revolving Loans Amortized Cost Basis 7,783   7,783   51,620
Revolving Loans Converted to Term Loans 32,991   32,991   32,965
Total $ 91,198   91,198   134,225
Commercial and Industrial and Commercial Real Estate          
Gross loan charge-offs          
Year one, gross loan charge-offs     0   1,979
Year two, gross loan charge-offs     232   7,048
Year three, gross loan charge-offs     1,820   4,031
Year four, gross loan charge-offs     733   21,122
Year five, gross loan charge-offs     567   15,471
More than five years gross loan charge-offs     32,601   29,715
Revolving Loans Amortized Cost Basis     4,857   23,458
Revolving Loans Converted to Term Loans     0   15,921
Total     $ 40,810   $ 118,745