v3.26.1
Loans and Allowances for Credit Losses (Tables)
 6 Months Ended
Jun. 30, 2026
Loans and Leases Receivable, Net Amount [Abstract]  
Schedule of Loans by Portfolio Segment [Table Text Block]
Portfolio segments of the loan portfolio are as follows (in thousands):
June 30, 2026December 31, 2025
Fixed
Rate		Variable
Rate		Non-accrualTotalFixed
Rate		Variable
Rate		Non-accrualTotal
Commercial$3,648,332 $12,619,958 $29,158 $16,297,448 $3,494,944 $11,750,021 $36,102 $15,281,067 
Commercial real estate
601,513 5,277,386 6,431 5,885,330 601,044 5,064,265 6,697 5,672,006 
Loans to individuals3,068,897 1,805,487 26,553 4,900,937 3,005,502 1,661,326 31,561 4,698,389 
Total$7,318,742 $19,702,831 $62,142 $27,083,715 $7,101,490 $18,475,612 $74,360 $25,651,462 
Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):
Three Months Ended
June 30, 2026
CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:
Beginning balance$135,619 $86,873 $55,227 $277,719 
Provision for loan losses(699)348 606 255 
Loans charged off(112)— (1,193)(1,305)
Recoveries of loans previously charged off
202 15 588 805 
Ending balance$135,010 $87,236 $55,228 $277,474 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$17,944 $25,762 $1,631 $45,337 
Provision for off-balance sheet credit risk
(691)747 86 142 
Ending balance$17,253 $26,509 $1,717 $45,479 
Six Months Ended
June 30, 2026
CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:
Beginning balance$137,225 $86,120 $52,515 $275,860 
Provision for loan losses(1,574)1,083 4,478 3,987 
Loans charged off(1,547)— (2,934)(4,481)
Recoveries of loans previously charged off
906 33 1,169 2,108 
Ending balance$135,010 $87,236 $55,228 $277,474 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$19,723 $30,086 $1,462 $51,271 
Provision for off-balance sheet credit risk
(2,470)(3,577)255 (5,792)
Ending balance$17,253 $26,509 $1,717 $45,479 
Three Months Ended
June 30, 2025
CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:
Beginning balance$143,505 $93,724 $41,365 $278,594 
Provision for loan losses744 (8,501)6,773 (984)
Loans charged off(35)(126)(1,152)(1,313)
Recoveries of loans previously charged off
184 10 558 752 
Ending balance$144,398 $85,107 $47,544 $277,049 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$16,167 $33,461 $2,460 $52,088 
Provision for off-balance sheet credit risk
828 97 (21)904 
Ending balance$16,995 $33,558 $2,439 $52,992 
Six Months Ended
June 30, 2025
CommercialCommercial Real EstateLoans to IndividualsTotal
Allowance for loan losses:
Beginning balance$145,153 $91,072 $43,810 $280,035 
Provision for loan losses(111)(6,034)4,825 (1,320)
Loans charged off(1,120)(126)(2,358)(3,604)
Recoveries of loans previously charged off476 195 1,267 1,938 
Ending balance$144,398 $85,107 $47,544 $277,049 
Allowance for off-balance sheet credit risk from unfunded loan commitments:
Beginning balance$18,046 $31,959 $1,635 $51,640 
Provision for off-balance sheet credit risk(1,051)1,599 804 1,352 
Ending balance$16,995 $33,558 $2,439 $52,992 
No provision for credit losses was necessary for the second quarter of 2026. An improvement in economic forecast assumptions, including GDP growth, lower unemployment, and improved vacancy rates compared to the prior quarter, was offset by the impact of loan growth during the quarter.

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at June 30, 2026, is as follows (in thousands):
Collectively Measured
for General Allowances		Individually Measured
for Specific Allowances		Total
Recorded InvestmentRelated AllowanceRecorded InvestmentRelated AllowanceRecorded InvestmentRelated
Allowance
Commercial$16,268,290 $131,798 $29,158 $3,212 $16,297,448 $135,010 
Commercial real estate5,878,899 87,236 6,431 — 5,885,330 87,236 
Loans to individuals4,874,384 55,228 26,553 — 4,900,937 55,228 
Total$27,021,573 $274,262 $62,142 $3,212 $27,083,715 $277,474 
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2025, is as follows (in thousands):

Collectively Measured
for General Allowances		Individually Measured
for Specific Allowances		Total
Recorded InvestmentRelated AllowanceRecorded InvestmentRelated AllowanceRecorded InvestmentRelated
Allowance
Commercial$15,244,965 $133,232 $36,102 $3,993 $15,281,067 $137,225 
Commercial real estate5,665,309 83,925 6,697 2,195 5,672,006 86,120 
Loans to individuals4,666,828 52,515 31,561 — 4,698,389 52,515 
Total$25,577,102 $269,672 $74,360 $6,188 $25,651,462 $275,860 
Schedule of Credit Quality Indicators [Table Text Block]
The following table summarizes the Company’s loan portfolio at June 30, 2026, by the risk grade categories and vintage (in thousands): 
Origination Year
20262025202420232022PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial:
Services
Pass$510,920 $572,703 $408,662 $420,794 $352,577 $716,908 $982,722 $332 $3,965,618 
Special Mention— 1,381 6,408 90 64 18,468 77,695 — 104,106 
Accruing Substandard— 5,443 6,562 7,520 869 5,171 1,650 12 27,227 
Nonaccrual— 375 29 1,686 838 — — — 2,928 
Total services510,920 579,902 421,661 430,090 354,348 740,547 1,062,067 344 4,099,879 
Loans charged off, year-to-date— — — — — — 1,043 — 1,043 
Healthcare
Pass497,309 1,142,412 474,405 398,903 672,974 542,470 237,766 4 3,966,243 
Special Mention— — 562 — 8,821 88 3 — 9,474 
Accruing Substandard— 1,483 — 16 3,379 82,107 — — 86,985 
Nonaccrual— — 1,162 14,850 — 5,100 — — 21,112 
Total healthcare497,309 1,143,895 476,129 413,769 685,174 629,765 237,769 4 4,083,814 
Energy
Pass34,561 118,121 50,018 38,504 9,256 12,170 2,790,032 — 3,052,662 
Total energy34,561 118,121 50,018 38,504 9,256 12,170 2,790,032 — 3,052,662 
Mortgage finance
Pass— 7,532 — 14,384 — — 429,910 — 451,826 
Total mortgage finance— 7,532 — 14,384 — — 429,910 — 451,826 
General business
Pass532,914 716,052 312,236 252,398 159,474 424,130 2,102,987 1,585 4,501,776 
Special Mention514 5,924 2,049 13,007 3,323 3,053 37,902 123 65,895 
Accruing Substandard14,123 8,507 2,528 4,352 2,333 1,740 2,889 6 36,478 
Nonaccrual2,302 — — — — 2,786 22 8 5,118 
Total general business549,853 730,483 316,813 269,757 165,130 431,709 2,143,800 1,722 4,609,267 
Loans charged off, year-to-date6 33 — — — — 444 21 504 
Total commercial1,592,643 2,579,933 1,264,621 1,166,504 1,213,908 1,814,191 6,663,578 2,070 16,297,448 
Origination Year
20262025202420232022PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial real estate:
Pass533,639 1,142,086 1,044,971 399,122 1,237,702 1,299,538 115,622 — 5,772,680 
Special Mention— — — — 34,354 2,005 — — 36,359 
Accruing Substandard3,319 — 1,988 17,154 — 47,399 — — 69,860 
Nonaccrual— — — — — 6,431 — — 6,431 
Total commercial real estate536,958 1,142,086 1,046,959 416,276 1,272,056 1,355,373 115,622 — 5,885,330 
Loans to individuals:
Residential mortgage
Pass262,304 512,129 354,651 231,515 230,143 695,018 501,065 26,357 2,813,182 
Special Mention— — 107 469 56 2,815 2,511 3,387 9,345 
Accruing Substandard— — — — 29 5,188 186 1,070 6,473 
Nonaccrual— 503 932 2,697 1,329 7,583 4,987 737 18,768 
Total residential mortgage262,304 512,632 355,690 234,681 231,557 710,604 508,749 31,551 2,847,768 
Loans charged off, year-to-date— — 10 — — 3 — — 13 
Residential mortgage guaranteed by U.S. government agencies
Pass— 2,216 9,904 12,458 8,162 119,561 — — 152,301 
Nonaccrual— — — — — 7,585 — — 7,585 
Total residential mortgage guaranteed by U.S. government agencies
— 2,216 9,904 12,458 8,162 127,146 — — 159,886 
Personal
Pass235,306 459,230 180,522 159,241 125,561 265,130 462,029 68 1,887,087 
Special Mention5 18 51 14 2 776 5,130 — 5,996 
Nonaccrual— — 51 19 3 127 — — 200 
Total personal235,311 459,248 180,624 159,274 125,566 266,033 467,159 68 1,893,283 
Loans charged off, year-to-date1
2,353 34 — 33 1 — 500 — 2,921 
Total loans to individuals497,615 974,096 546,218 406,413 365,285 1,103,783 975,908 31,619 4,900,937 
Total loans$2,627,216 $4,696,115 $2,857,798 $1,989,193 $2,851,249 $4,273,347 $7,755,108 $33,689 $27,083,715 
1    Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
The following table summarizes the Company's loan portfolio at December 31, 2025, by the risk grade categories and vintage (in thousands): 
Origination Year
20252024202320222021PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial:
Services
Pass$693,147 $462,642 $488,381 $393,685 $265,346 $612,098 $865,163 $491 $3,780,953 
Special Mention1,071 4,369 428 — — 20,011 76,565 — 102,444 
Accruing Substandard4,595 218 9,857 1,421 2,136 3,404 754 — 22,385 
Nonaccrual446 29 — 864 — — 4,796 — 6,135 
Total services699,259 467,258 498,666 395,970 267,482 635,513 947,278 491 3,911,917 
Loans charged off, year-to-date— — — — — — 4,147 21 4,168 
Healthcare
Pass1,110,851 460,630 413,197 744,765 298,992 546,567 226,298 9 3,801,309 
Special Mention— — — 43,576 96 — 5 — 43,677 
Accruing Substandard181 9,589 37,492 4,144 5,170 83,156 — — 139,732 
Nonaccrual— — 14,850 — — 8,638 2 — 23,490 
Total healthcare1,111,032 470,219 465,539 792,485 304,258 638,361 226,305 9 4,008,208 
Loans charged off, year-to-date— — — — 31 — — — 31 
Energy
Pass147,840 58,798 44,882 10,479 2,297 19,500 2,598,446 — 2,882,242 
Total energy147,840 58,798 44,882 10,479 2,297 19,500 2,598,446 — 2,882,242 
Loans charged off, year-to-date— — — — — — 94 — 94 
Mortgage finance:
Pass— — — — — — 177,765 — 177,765 
Total mortgage finance— — — — — — 177,765 — 177,765 
General business
Pass845,421 389,679 424,859 179,660 139,664 318,834 1,888,938 1,369 4,188,424 
Special Mention24,882 1,480 6,920 4,288 7,070 2,099 40,873 106 87,718 
Accruing Substandard641 4,338 4,416 5,441 1,466 — 2,014 — 18,316 
Nonaccrual— — 1,445 2,163 72 2,787 — 10 6,477 
Total general business870,944 395,497 437,640 191,552 148,272 323,720 1,931,825 1,485 4,300,935 
Loans charged off, year-to-date14 — 132 — — — 826 109 1,081 
Total commercial2,829,075 1,391,772 1,446,727 1,390,486 722,309 1,617,094 5,881,619 1,985 15,281,067 
Origination Year
20252024202320222021PriorRevolving LoansRevolving Loans Converted to Term LoansTotal
Commercial real estate:
Pass948,049 939,354 476,954 1,670,158 671,080 777,510 107,199 — 5,590,304 
Special Mention— — — 6,405 — 3,949 — — 10,354 
Accruing Substandard— 484 — 4,971 29,324 29,872 — — 64,651 
Nonaccrual— — — — — 6,697 — — 6,697 
Total commercial real estate948,049 939,838 476,954 1,681,534 700,404 818,028 107,199 — 5,672,006 
Loans charged off, year-to-date— — — 126 — — — — 126 
Loans to individuals:
Residential mortgage
Pass564,508 404,186 265,734 250,169 280,232 452,195 458,006 29,190 2,704,220 
Special Mention— — — 140 10 5,387 1,628 1,298 8,463 
Accruing Substandard— — 72 — — 12 385 — 469 
Nonaccrual95 1,333 1,314 1,594 1,402 7,280 4,465 780 18,263 
Total residential mortgage564,603 405,519 267,120 251,903 281,644 464,874 464,484 31,268 2,731,415 
Loans charged off, year-to-date— 38 48 — — 56 178 — 320 
Residential mortgage guaranteed by U.S. government agencies
Pass776 3,676 9,453 8,486 2,801 124,581 — — 149,773 
Nonaccrual— — 398 265 — 7,923 — — 8,586 
Total residential mortgage guaranteed by U.S. government agencies
776 3,676 9,851 8,751 2,801 132,504 — — 158,359 
Personal
Pass489,188 188,899 201,427 140,602 101,967 197,075 476,829 282 1,796,269 
Special Mention22 18 46 17 16 4 1,182 — 1,305 
Accruing Substandard6,186 12 — 2 — 129 — — 6,329 
Nonaccrual7 56 4,627 9 12 1 — — 4,712 
Total personal495,403 188,985 206,100 140,630 101,995 197,209 478,011 282 1,808,615 
Loans charged off, year-to-date1
4,325 87 24 19 — 5 25 — 4,485 
Total loans to individuals1,060,782 598,180 483,071 401,284 386,440 794,587 942,495 31,550 4,698,389 
Total loans$4,837,906 $2,929,790 $2,406,752 $3,473,304 $1,809,153 $3,229,709 $6,931,313 $33,535 $25,651,462 
1    Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
Financing Receivable, Nonaccrual [Table Text Block]
A summary of nonaccruing loans at June 30, 2026, follows (in thousands): 
As of June 30, 2026
TotalWith No
Allowance		With AllowanceRelated Allowance
Commercial:
Healthcare$21,112 $— $21,112 $692 
Services2,928 1,242 1,686 170 
General business5,118 2,368 2,750 2,350 
Total commercial29,158 3,610 25,548 3,212 
Commercial real estate6,431 6,431 — — 
Loans to individuals:
Residential mortgage18,768 18,768 — — 
Residential mortgage guaranteed by U.S. government agencies7,585 7,585 — — 
Personal200 200 — — 
Total loans to individuals26,553 26,553 — — 
Total$62,142 $36,594 $25,548 $3,212 

The majority of our nonaccruing loans are considered collateral dependent where repayment is expected to be provided through operation or sale of the collateral. Nonaccruing commercial and commercial real estate loans are primarily secured by commercial real estate and nonaccruing residential mortgage loans are secured by residential real estate.

A summary of nonaccruing loans at December 31, 2025, follows (in thousands): 
As of December 31, 2025
TotalWith No
Allowance		With AllowanceRelated Allowance
Commercial:
Healthcare$23,490 $18,390 $5,100 $200 
Services6,135 1,339 4,796 1,043 
General business6,477 3,727 2,750 2,750 
Total commercial36,102 23,456 12,646 3,993 
Commercial real estate6,697 — 6,697 2,195 
Loans to individuals:
Residential mortgage18,263 18,263 — — 
Residential mortgage guaranteed by U.S. government agencies8,586 8,586 — — 
Personal4,712 4,712 — — 
Total loans to individuals31,561 31,561 — — 
Total$74,360 $55,017 $19,343 $6,188 
Summary of Loans by Aging Status [Table Text Block]
A summary of loans currently performing and past due as of June 30, 2026, is as follows (in thousands):
Past DuePast Due 90 Days or More and Accruing
Current30 to 59
Days		60 to 89 Days90 Days
or More		Total
Commercial:
Services$4,097,686 $255 $1,907 $31 $4,099,879 $3 
Healthcare4,059,524 32 1 24,257 4,083,814 4,307 
Energy3,052,462 200 — — 3,052,662 — 
Mortgage finance451,826 — — — 451,826 — 
General business4,597,635 5,730 1,880 4,022 4,609,267 1,250 
Total commercial16,259,133 6,217 3,788 28,310 16,297,448 5,560 
Commercial real estate5,878,647 252 — 6,431 5,885,330 — 
Loans to individuals:
Residential mortgage2,815,934 18,847 8,123 4,864 2,847,768 682 
Residential mortgage guaranteed by U.S. government agencies51,004 15,530 11,480 81,872 159,886 78,507 
Personal1,892,797 455 21 10 1,893,283 — 
Total loans to individuals4,759,735 34,832 19,624 86,746 4,900,937 79,189 
Total$26,897,515 $41,301 $23,412 $121,487 $27,083,715 $84,749 
A summary of loans currently performing and past due as of December 31, 2025, is as follows (in thousands):
Past DuePast Due 90 Days or More and Accruing
Current30 to 59
Days		60 to 89 Days90 Days
or More		Total
Commercial:
Services$3,903,616 $3,476 $4,796 $29 $3,911,917 $— 
Healthcare3,984,720 — — 23,488 4,008,208 — 
Energy2,882,242 — — — 2,882,242 — 
Mortgage finance177,765 — — — 177,765 — 
General business4,291,391 5,702 3,842 — 4,300,935 — 
Total commercial15,239,734 9,178 8,638 23,517 15,281,067 — 
Commercial real estate5,664,492 817 — 6,697 5,672,006 — 
Loans to individuals:
Residential mortgage2,714,617 8,570 2,182 6,046 2,731,415 — 
Residential mortgage guaranteed by U.S. government agencies
47,950 17,975 11,377 81,057 158,359 76,535 
Personal1,799,975 3,463 551 4,626 1,808,615 — 
Total loans to individuals4,562,542 30,008 14,110 91,729 4,698,389 76,535 
Total$25,466,768 $40,003 $22,748 $121,943 $25,651,462 $76,535