v3.25.4
Accumulated other comprehensive income (loss) (Tables)
 12 Months Ended
Dec. 31, 2025
Equity [Abstract]  
Schedule of AOCL components
Unrealized net gains (losses)
 on translation of
 net investment in
 foreign
 operations		Unrealized net
 gains (losses)
 on HTM
 investments		Unrealized net
 gains (losses)
 on AFS
 investments		Employee benefit plans adjustments
Year ended December 31, 2025PensionPost-retirement
 healthcare		Subtotal -
 employee
benefits plans		Total AOCIL
Balance at beginning of year(26,191)(73,919)(162,275)(49,282)16,252 (33,030)(295,415)
Other comprehensive income (loss), net of taxes6,419 7,895 73,988 2,165 793 2,958 91,260 
Balance at end of year(19,772)(66,024)(88,287)(47,117)17,045 (30,072)(204,155)
Unrealized net gains (losses)
 on translation of
 net investment in
 foreign
 operations		Unrealized net
 gains (losses)
 on HTM
 investments		Unrealized net
 gains (losses)
 on AFS
 investments		Employee benefit plans adjustments
Year ended December 31, 2024PensionPost- retirement
 healthcare		Subtotal -
 employee
benefits plans		Total AOCIL
Balance at beginning of year(25,478)(82,067)(162,910)(51,563)11,820 (39,743)(310,198)
Other comprehensive income (loss), net of taxes(713)8,148 635 2,281 4,432 6,713 14,783 
Balance at end of year(26,191)(73,919)(162,275)(49,282)16,252 (33,030)(295,415)
Unrealized net gains (losses)
 on translation of
 net investment in
 foreign
 operations		Unrealized net
 gains (losses)
 on HTM
 investments		Unrealized net
 gains (losses)
 on AFS
 investments		Employee benefit plans adjustments
Year ended December 31, 2023PensionPost- retirement
 healthcare		Subtotal -
 employee
benefits plans		Total AOCIL
Balance at beginning of year(25,700)(91,212)(220,345)(47,905)7,710 (40,195)(377,452)
Other comprehensive income (loss), net of taxes222 9,145 57,435 (3,658)4,110 452 67,254 
Balance at end of year(25,478)(82,067)(162,910)(51,563)11,820 (39,743)(310,198)
Schedule of net change in AOCL components
Net Change of AOCIL ComponentsYear ended
Line item in the consolidated statements of operations, if anyDecember 31, 2025December 31, 2024December 31, 2023
Net unrealized gains (losses) on translation of net investment in foreign operations adjustments
Foreign currency translation adjustmentsN/A33,254 (8,876)19,420 
Gains (losses) on net investment hedgeN/A(26,835)8,163 (19,198)
Net change6,419 (713)222 
Held-to-maturity investment adjustments
Amortization of net gains (losses) to net incomeInterest income on investments7,895 8,148 9,145 
Net change7,895 8,148 9,145 
Available-for-sale investment adjustments
Gross unrealized gains (losses)N/A76,247 355 60,199 
Transfer of realized (gains) losses to net incomeNet realized gains (losses) on AFS investments— — 14 
Foreign currency translation adjustments of related balancesN/A(2,259)280 (2,778)
Net change73,988 635 57,435 
Employee benefit plans adjustments
Defined benefit pension plan
Net actuarial gain (loss) N/A1,439 (288)(5,762)
Amortization of net actuarial (gains) lossesNon-service employee benefits expense2,341 2,358 2,284 
Amortization of prior service (credit) costNon-service employee benefits expense82 79 79 
Change in deferred taxesN/A(1,135)— — 
Foreign currency translation adjustments of related balancesN/A(562)132 (259)
Net change2,165 2,281 (3,658)
Post-retirement healthcare plan
Net actuarial gain (loss) N/A871 6,219 4,919 
Amortization of net actuarial (gains) lossesNon-service employee benefits expense(602)524 524 
Amortization of prior service (credit) costNon-service employee benefits expense524 (2,311)(1,333)
Net change793 4,432 4,110 
Other comprehensive income (loss), net of taxes91,260 14,783 67,254