v3.26.3
Loans and Allowance for Credit Losses on Loans - Loans by Investment Grade (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year $ 2,700,956   $ 2,901,098
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 2,578,454   1,864,486
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 1,568,742   1,705,297
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 1,259,569   2,455,183
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 1,432,466   715,721
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 1,042,879   884,023
Revolving lines of credit 13,482,995   13,498,964
Revolving lines of credit converted to term loans 16,929   15,430
Total 24,082,990   24,040,202
Financing receivable, excluding accrued interest, year one, originated, current fiscal year, writeoff 184   11,233
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year, writeoff 3,201   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 16,359   8,958
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year, writeoff 7,636   28
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year, writeoff 3,857   2,011
Revolving lines of credit, writeoff 10,885   25,715
Revolving line of credit converted to term loans, writeoff 0   0
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 49,436 $ 37,942 52,883
Commercial      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,800,531   2,082,776
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,678,867   1,189,891
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 899,221   734,628
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 545,457   749,826
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 528,597   157,957
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 193,310   160,701
Revolving lines of credit 7,770,648   7,078,407
Revolving lines of credit converted to term loans 11,697   9,359
Total 13,428,328   12,163,545
Financing receivable, excluding accrued interest, allowance for credit loss, writeoff 42,338 37,011  
Commercial | Pass      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,792,251   2,038,311
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 1,586,431   1,164,863
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 819,811   671,070
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 513,166   670,995
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 497,666   107,970
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 145,659   143,631
Revolving lines of credit 7,534,860   6,977,639
Revolving lines of credit converted to term loans 11,601   9,359
Total 12,901,445   11,783,838
Commercial | Special mention      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 3,341   7,659
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 55,680   16,204
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 40,812   16,093
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 14,904   42,441
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 19   15,346
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 1,262   1,239
Revolving lines of credit 194,606   39,073
Revolving lines of credit converted to term loans 96   0
Total 310,720   138,055
Commercial | Substandard - accruing      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 1,804   25,513
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 23,114   8,824
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 38,598   44,506
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 363   0
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 10,927   34,641
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 34,906   4,192
Revolving lines of credit 23,606   27,830
Revolving lines of credit converted to term loans 0   0
Total 133,318   145,506
Commercial | Non-accrual      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 3,135   11,293
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 13,642   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 17,024   36,390
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 19,985   0
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 11,483   11,639
Revolving lines of credit 17,576   33,865
Revolving lines of credit converted to term loans 0   0
Total 82,845   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 5,441,689   6,064,019
Revolving lines of credit converted to term loans 0   0
Total 5,441,689   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 5,441,689   6,064,019
Revolving lines of credit converted to term loans 0   0
Total 5,441,689   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 882,493   781,815
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 871,100   636,744
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 638,573   942,488
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 691,816   1,654,592
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 860,890   484,840
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 685,761   609,882
Revolving lines of credit 150,648   262,280
Revolving lines of credit converted to term loans 5,232   6,071
Total 4,786,513   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 882,493   781,062
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 871,100   565,727
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 615,750   941,760
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 691,454   1,543,106
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 697,574   423,708
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 625,658   608,352
Revolving lines of credit 143,648   254,480
Revolving lines of credit converted to term loans 5,232   5,305
Total 4,532,909   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 0   45,137
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 4,323   728
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 0   90,752
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 142,393   61,132
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 60,002   1,530
Revolving lines of credit 7,000   7,800
Revolving lines of credit converted to term loans 0   766
Total 213,718   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 362   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 463   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 20,923   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 39,423   20,734
Consumer      
Financing Receivable, Recorded Investment [Line Items]      
Financing receivable, excluding accrued interest, year one, originated, current fiscal year 17,932   36,507
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 28,487   37,851
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 30,948   28,181
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 22,296   50,765
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 42,979   72,924
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 163,808   113,440
Revolving lines of credit 120,010   94,258
Revolving lines of credit converted to term loans 0   0
Total 426,460   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 17,932   36,507
Financing receivable, excluding accrued interest, year two, originated, fiscal year before current fiscal year 28,487   37,851
Financing receivable, excluding accrued interest, year three, originated, two years before current fiscal year 30,948   28,181
Financing receivable, excluding accrued interest, year four, originated, three years before current fiscal year 22,296   50,765
Financing receivable, excluding accrued interest, year five, originated, four years before current fiscal year 42,979   72,924
Financing receivable, excluding accrued interest, originated, more than five years before current fiscal year 162,237   113,440
Revolving lines of credit 119,660   94,258
Revolving lines of credit converted to term loans 0   0
Total 424,539   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 1,502   0
Revolving lines of credit 350   0
Revolving lines of credit converted to term loans 0   0
Total 1,852   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 69   0
Revolving lines of credit 0   0
Revolving lines of credit converted to term loans 0   0
Total $ 69   $ 0