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Investment Securities - Amortized Cost and Fair Value of Investment Securities Pledged as Collateral (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Amortized Cost	$ 724,246	$ 1,137,794
Fair Value	666,252	1,016,108
State and local governments public deposits
Amortized Cost	232,915	238,060
Fair Value	225,360	224,879
FRB
Amortized Cost	437,490	845,098
Fair Value	391,119	742,197
Other securities pledged
Amortized Cost	53,841	54,636
Fair Value	$ 49,773	$ 49,032

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