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Investment Securities - Trading Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Investment Securities
Trading securities	$ 114,154	$ 31,263
U.S. Government agencies
Investment Securities
Trading securities	9,945	11,190
Residential mortgage pass-through securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	21,399
Other residential mortgage issued or guaranteed by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	13,590
Commercial mortgage-backed securities issued by U.S. government agencies or sponsored enterprises
Investment Securities
Trading securities	44,910	4,589
State and municipal obligations
Investment Securities
Trading securities	16,059	13,993
Other debt securities
Investment Securities
Trading securities	$ 8,251	$ 1,491

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