v3.25.4
Goodwill and other intangible assets - Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Roll Forward]      
Balance at beginning of year $ 23,617 $ 24,107 $ 22,892
Foreign exchange translation adjustment 1,768 (490) 1,215
Balance at end of year 25,385 23,617 24,107
Cayman      
Goodwill [Roll Forward]      
Balance at beginning of year 551 551 551
Foreign exchange translation adjustment 0 0 0
Balance at end of year 551 551 551
Channel Islands and the UK      
Goodwill [Roll Forward]      
Balance at beginning of year 21,019 21,415 20,272
Foreign exchange translation adjustment 1,599 (396) 1,143
Balance at end of year 22,618 21,019 21,415
Other      
Goodwill [Roll Forward]      
Balance at beginning of year 2,047 2,141 2,069
Foreign exchange translation adjustment 169 (94) 72
Balance at end of year $ 2,216 $ 2,047 $ 2,141