Securities, HTM Debt Securities, Contractual Maturities (Details) $ in Thousands	Dec. 31, 2023 USD ($) Issuer	Dec. 31, 2022 USD ($) Issuer	Dec. 31, 2021 Issuer
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 92,757
From one to five years	113,075
From five to ten years	262,943
After ten years	436,492
Amortized cost	905,267	$ 919,517
Held-to-maturity Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	92,724
From one to five years	109,686
From five to ten years	231,113
After ten years	381,001
Fair value	$ 814,524	$ 812,647
Number of issuers whose holdings exceeded 10% of consolidated stockholders' equity, excluding U.S. Government securities | Issuer	0	0	0