Investment Securities - Debt Maturities (Details) - Investment securities: - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Amortized Cost
Due within one year	$ 934,927
Due after one year through five years	620,188
Due after five years through ten years	2,262,727
Due after ten years	772,854
Debt securities, available-for-sale, amortized cost	4,590,696	$ 3,834,714
Fair Value
Due within one year	920,426
Due after one year through five years	606,506
Due after five years through ten years	2,107,401
Due after ten years	767,546
Total, Fair Value	$ 4,401,879	$ 3,836,391
Weighted- Average Yield
Due within one year	0.73%
Due after one year through five years	1.50%
Due after five years through ten years	2.57%
Due after ten years	2.65%
Total, Weighted-Average Yield	2.06%