Investment Securities - Investments in Debt and Equity Securities Reported Less than Historical Cost (Details) - Investments reported at less than historical cost - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Historical cost	$ 2,207,633	$ 658,858
Fair value	1,910,508	645,218
Gross unrealized losses	$ 297,125	$ 13,640
Percent of the Corporation's investments available for sale	96.70%	27.50%