Investment Securities - Contractual Maturities of Debt Securities Held to Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Amortized Cost
Due in one year	$ 64,515
Due after one year through five years	56,432
Due after five years through ten years	167,145
Due after ten years	515,514
Residential mortgage-backed securities	2,742,355
Amortized Cost	3,545,961	$ 3,532,220
Fair Value
Due in one year	64,387
Due after one year through five years	55,699
Due after five years through ten years	157,478
Due after ten years	446,794
Residential mortgage-backed securities	2,373,276
Total	$ 3,097,634	$ 3,028,284

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

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