v3.26.1
Loans and Allowance for Credit Losses on Loans - Loans by Investment Grade (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year $ 1,953,774   $ 2,901,098
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 2,639,298   1,864,486
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,706,210   1,705,297
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 1,516,379   2,455,183
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 1,655,229   715,721
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 1,299,723   884,023
Revolving lines of credit 14,160,730   13,498,964
Revolving lines of credit converted to term loans 15,883   15,430
Total 24,947,226   24,040,202
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff 33   11,233
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff 3,136   704
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year, writeoff 7,314   4,234
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year, writeoff 8,107   8,958
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff 7,264   28
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year, writeoff 0   2,011
Revolving lines of credit, writeoff 8,731   25,715
Revolving line of credit converted to term loans, writeoff 0   0
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 34,585 $ 24,148 52,883
Commercial      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,280,079   2,082,776
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,786,875   1,189,891
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,035,041   734,628
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 611,382   749,826
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 513,286   157,957
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 248,436   160,701
Revolving lines of credit 7,520,727   7,078,407
Revolving lines of credit converted to term loans 10,377   9,359
Total 13,006,203   12,163,545
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 27,487 23,217  
Commercial | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,277,986   2,038,311
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,748,719   1,164,863
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 999,490   671,070
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 563,475   670,995
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 470,810   107,970
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 183,760   143,631
Revolving lines of credit 7,336,769   6,977,639
Revolving lines of credit converted to term loans 10,377   9,359
Total 12,591,386   11,783,838
Commercial | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 268   7,659
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 3,189   16,204
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 26,797   16,093
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 17,625   42,441
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 21,681   15,346
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 14,142   1,239
Revolving lines of credit 152,797   39,073
Revolving lines of credit converted to term loans 0   0
Total 236,499   138,055
Commercial | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,697   25,513
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 21,234   8,824
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 8,754   44,506
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 5,000   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   34,641
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 39,127   4,192
Revolving lines of credit 17,091   27,830
Revolving lines of credit converted to term loans 0   0
Total 92,903   145,506
Commercial | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 128   11,293
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 13,733   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   2,959
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 25,282   36,390
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 20,795   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 11,407   11,639
Revolving lines of credit 14,070   33,865
Revolving lines of credit converted to term loans 0   0
Total 85,415   96,146
Mortgage finance      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 6,383,381   6,064,019
Revolving lines of credit converted to term loans 0   0
Total 6,383,381   6,064,019
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 0 0  
Mortgage finance | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 6,383,381   6,064,019
Revolving lines of credit converted to term loans 0   0
Total 6,383,381   6,064,019
Mortgage finance | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Mortgage finance | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Mortgage finance | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Commercial real estate      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 660,682   781,815
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 818,873   636,744
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 640,082   942,488
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 878,799   1,654,592
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 1,098,672   484,840
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 877,453   609,882
Revolving lines of credit 148,308   262,280
Revolving lines of credit converted to term loans 5,506   6,071
Total 5,128,375   5,378,712
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 7,098 931  
Commercial real estate | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 660,682   781,062
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 818,292   565,727
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 616,532   941,760
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 820,533   1,543,106
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 972,383   423,708
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 813,210   608,352
Revolving lines of credit 141,308   254,480
Revolving lines of credit converted to term loans 5,506   5,305
Total 4,848,446   5,123,500
Commercial real estate | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   743
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 581   45,137
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 5,050   728
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 58,266   90,752
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 106,223   61,132
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 64,142   1,530
Revolving lines of credit 7,000   7,800
Revolving lines of credit converted to term loans 0   766
Total 241,262   208,588
Commercial real estate | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   10
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   25,880
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 101   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 101   25,890
Commercial real estate | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 18,500   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   20,734
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 20,066   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 38,566   20,734
Consumer      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 13,013   36,507
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 33,550   37,851
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 31,087   28,181
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 26,198   50,765
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 43,271   72,924
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 173,834   113,440
Revolving lines of credit 108,314   94,258
Revolving lines of credit converted to term loans 0   0
Total 429,267   433,926
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 0 $ 0  
Consumer | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 13,013   36,507
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 33,550   37,851
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 31,087   28,181
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 26,198   50,765
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 43,271   72,924
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 172,254   113,440
Revolving lines of credit 108,314   94,258
Revolving lines of credit converted to term loans 0   0
Total 427,687   433,926
Consumer | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 1,580   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 1,580   0
Consumer | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total 0   0
Consumer | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 0   0
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 0   0
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 0   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 0   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total $ 0   $ 0