v3.25.4
Investment in securities - Narrative (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Debt securities, available-for-sale, unrealized loss position, number of positions 156 184
Debt securities, available-for-sale, securities in unrealized loss positions, percentage of portfolio fair value 52.10% 87.70%
Debt securities, available-for-sale, securities in unrealized loss positions, percentage of fair value of affected securities 7.30% 8.30%
Available-for-sale debt securities pledged that secured parties are permitted to sell or repledge | $ $ 0 $ 93,468
US government and federal agencies    
Debt Securities, Available-for-sale [Line Items]    
Held-to-maturity, securities in unrealized loss positions, number of positions 218 220
Held-to-maturity, securities in unrealized loss positions, percentage of portfolio fair value 98.80% 100.00%
Held-to-maturity, securities in unrealized loss positions, percentage of fair value of affected securities 16.90% 21.30%
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, available-for-sale, unrealized loss position, number of positions 13 13
Residential mortgage-backed securities | Minimum    
Debt Securities, Available-for-sale [Line Items]    
Percentage of weighted average credit support 16.00%  
Percentage of loan to value ratio 42.00%  
Residential mortgage-backed securities | Maximum    
Debt Securities, Available-for-sale [Line Items]    
Percentage of weighted average credit support 50.00%  
Percentage of loan to value ratio 51.00%