Investment Securities - Contractual Maturities of Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Amortized Cost
Due in one year	$ 26,489
Due after one year through five years	109,365
Due after five years through ten years	165,751
Due after ten years	545,080
Residential mortgage-backed securities	2,804,769
Amortized Cost	3,651,454	$ 3,740,413
Fair Value
Due in one year	26,345
Due after one year through five years	106,796
Due after five years through ten years	154,096
Due after ten years	473,456
Residential mortgage-backed securities	2,379,255
Total	$ 3,139,948	$ 3,302,312

Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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