Investment Securities - Debt Maturities (Details) - Investment securities: - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost
Due within one year	$ 780,641
Due after one year through five years	658,748
Due after five years through ten years	2,577,103
Due after ten years	752,934
Debt securities, available-for-sale, amortized cost	4,769,426	$ 3,834,714
Fair Value
Due within one year	769,179
Due after one year through five years	648,594
Due after five years through ten years	2,420,688
Due after ten years	741,103
Total, Fair Value	$ 4,579,564	$ 3,836,391
Weighted- Average Yield
Due within one year	0.52%
Due after one year through five years	3.09%
Due after five years through ten years	3.49%
Due after ten years	4.17%
Total, Weighted-Average Yield	3.06%