Investment Securities - Trading Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Investment Securities
Trading securities	$ 87,103	$ 31,321
U.S. Government agencies
Investment Securities
Trading securities	10,730	1,537
Residential mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	15,969	14,461
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	24,344
State and municipal obligations
Investment Securities
Trading securities	26,347	14,620
Small Business Administration loan-backed securities
Investment Securities
Trading securities	8,552
Other debt securities
Investment Securities
Trading securities	$ 1,161	$ 703