Securities - Carrying value of other investment securities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Other investment securities
Carrying Value	$ 345,695	$ 223,613
Federal Home Loan Bank stock
Other investment securities
Carrying Value	25,209	18,087
Federal Reserve Bank Stock
Other investment securities
Carrying Value	232,474	150,261
Investment in unconsolidated subsidiaries
Other investment securities
Carrying Value	5,287	3,563
Other investment securities
Other investment securities
Carrying Value	$ 82,725	$ 51,702