Securities, HTM Debt Securities, Contractual Maturities (Details) $ in Thousands	Sep. 30, 2024 USD ($) Issuer	Dec. 31, 2023 USD ($) Issuer
Held-to-maturity Securities, Debt Maturities, Amortized Cost [Abstract]
Within one year	$ 94,236
From one to five years	143,062
From five to ten years	218,104
After ten years	399,539
Amortized cost	854,941	$ 905,267
Held-to-maturity Securities, Debt Maturities, Estimated Fair Value [Abstract]
Within one year	94,130
From one to five years	139,223
From five to ten years	194,873
After ten years	353,642
Fair value	$ 781,868	$ 814,524
Number of issuers whose holdings exceeded 10% of consolidated stockholders' equity, excluding U.S. Government securities and Government-sponsored enterprises securities | Issuer	0	0