Securities - Other investments (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Securities
Other non-public investments	$ 22,837	$ 23,294
Federal Home Loan Bank Stock
Securities
Other non-public investments	10,317	6,728
Federal Reserve Bank Stock
Securities
Other non-public investments	6,277	12,142
Depositors Insurance Fund Stock
Securities
Other non-public investments	139	139
COCC Stock
Securities
Other non-public investments	555	300
Jassby Inc
Securities
Other non-public investments	1,000	1,000
Reinventure Capital Fund LLP
Securities
Other non-public investments	2,068	1,818
LearnLaunch Fund III L.P
Securities
Other non-public investments	650	455
Massachusetts Housing Investment Corporation
Securities
Other non-public investments	337	337
Cross Impact Capital
Securities
Other non-public investments	750	$ 375
Mosaic
Securities
Other non-public investments	510
Visible Hands
Securities
Other non-public investments	$ 234