Securities, HTM Debt Securities, Contractual Maturities (Details) $ in Thousands	Mar. 31, 2023 USD ($) Issuer	Dec. 31, 2022 USD ($) Issuer
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 51,124
From one to five years	100,684
From five to ten years	270,074
After ten years	484,942
Amortized cost	906,824	$ 919,517
Held-to-maturity Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	51,112
From one to five years	98,539
From five to ten years	237,794
After ten years	425,219
Fair value	$ 812,664	$ 812,647
Number of issuers whose holdings exceeded 10% of consolidated stockholders' equity, excluding U.S. Government securities and Government-sponsored enterprises securities | Issuer	0	0