v3.25.4
Investment in securities (Tables)
 12 Months Ended
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of marketable securities
December 31, 2025December 31, 2024
Amortized
 cost		Gross
 unrealized
 gains		Gross
 unrealized
 losses		Fair valueAmortized
 cost		Gross
 unrealized
 gains		Gross
 unrealized
 losses		Fair value
Available-for-sale
US government and federal agencies2,770,749 12,549 (100,827)2,682,471 2,324,841 1,451 (162,673)2,163,619 
Non-US governments debt securities— — — — 93,803 — (335)93,468 
Asset-backed securities - Student loans— — — — 40 — — 40 
Residential mortgage-backed securities14,859 — (1,077)13,782 17,068 — (1,709)15,359 
Total available-for-sale 2,785,608 12,549 (101,904)2,696,253 2,435,752 1,451 (164,717)2,272,486 
Held-to-maturity1
US government and federal agencies2,992,052 857 (426,439)2,566,470 3,240,290 — (569,250)2,671,040 
Total held-to-maturity2,992,052 857 (426,439)2,566,470 3,240,290 — (569,250)2,671,040 
1 For the years ended December 31, 2025, 2024 and 2023, impairments recognized in other comprehensive income for HTM investments were nil.
In the following tables, debt securities with unrealized losses that are not deemed to be credit impaired and for which an allowance for credit losses has not been recorded are categorized as being in a loss position for "less than 12 months" or "12 months or more" based on the point in time that the fair value most recently declined below the amortized cost basis.
Less than 12 months12 months or more
December 31, 2025Fair
value		Gross
 unrealized
 losses		Fair
value		Gross
unrealized
losses		Total
 fair value		Total gross
unrealized
losses
Available-for-sale securities with unrealized losses
US government and federal agencies94,588 (120)1,296,411 (100,707)1,390,999 (100,827)
Residential mortgage-backed securities— — 13,782 (1,077)13,782 (1,077)
Total available-for-sale securities with unrealized losses94,588 (120)1,310,193 (101,784)1,404,781 (101,904)
Held-to-maturity securities with unrealized losses
US government and federal agencies— — 2,530,638 (426,439)2,530,638 (426,439)
Less than 12 months12 months or more
December 31, 2024Fair
value		Gross
 unrealized
 losses		Fair
value		Gross
unrealized
losses		Total
fair value		Total gross
unrealized
losses
Available-for-sale securities with unrealized losses
US government and federal agencies696,835 (7,922)1,187,094 (154,751)1,883,929 (162,673)
Non-US governments debt securities— — 93,468 (335)93,468 (335)
Asset-backed securities - Student loans— — 40 — 40 — 
Residential mortgage-backed securities— — 15,359 (1,709)15,359 (1,709)
Total available-for-sale securities with unrealized losses696,835 (7,922)1,295,961 (156,795)1,992,796 (164,717)
Held-to-maturity securities with unrealized losses
US government and federal agencies36,713 (476)2,634,326 (568,774)2,671,039 (569,250)
December 31, 2025December 31, 2024
Pledged Investments - secured customer deposit product Amortized
 cost 		 Fair
 value 		 Amortized
 cost 		 Fair
 value
Available-for-sale19,184 18,331 22,888 21,062 
Held-to-maturity96,811 87,154 95,588 84,003 
Schedule of investments maturities
The following table presents the remaining term to contractual maturity of the Bank’s securities. The actual maturities may differ as certain securities offer prepayment options to the borrowers.
Remaining term to maturity
December 31, 2025
Within 1 year
1 to 5
 years		5 to 10
 years		Over
10 years		No specific or single
 maturity		Carrying
 amount
Available-for-sale
US government and federal agencies548,825 793,259 — — 1,340,387 2,682,471 
Residential mortgage-backed securities— — — — 13,782 13,782 
Total available-for-sale548,825 793,259 — — 1,354,169 2,696,253 
Held-to-maturity
US government and federal agencies— — — — 2,992,052 2,992,052