Securities, HTM Debt Securities, Contractual Maturities (Details) $ in Thousands	Jun. 30, 2023 USD ($) Issuer	Dec. 31, 2022 USD ($) Issuer
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 72,506
From one to five years	100,046
From five to ten years	282,757
After ten years	457,567
Amortized cost	912,876	$ 919,517
Held-to-maturity Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	72,463
From one to five years	96,551
From five to ten years	245,029
After ten years	394,598
Fair value	$ 808,641	$ 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