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Investment Securities - Amortized Cost and Fair Value of Investment Securities Pledged as Collateral (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost	$ 732,131	$ 1,137,794
Fair Value	646,478	1,016,108
State and local governments public deposits
Amortized Cost	236,818	238,060
Fair Value	220,885	224,879
FRB
Amortized Cost	441,429	845,098
Fair Value	377,504	742,197
Other securities pledged
Amortized Cost	53,884	54,636
Fair Value	$ 48,089	$ 49,032

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