Securities - Federal Home Loan Bank Stock (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Securities
Investment account balance in FHLB	$ 10.3	$ 6.7
Shares to be maintained in Federal Reserve Bank	50.00%
Stock par value (in $ per share)	$ 100
Stock par value to be paid at purchase (i $ per share)	$ 50
Dividends at the statutory rate (in %)	6.00%
Dividend per share (in $ per share)	$ 1.5
Federal Reserve Stock holdings requirement Change percentage (in %)	15.00%
Federal Reserve Stock holdings requirement Change in shares (in shares)	100
Federal Reserve Bank Stock, shares (in shares)	125,538	242,844
Federal Reserve Bank stock, at cost	$ 6.3	$ 12.1