Debt Securities - Narrative (Details)	9 Months Ended
	Sep. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Schedule of Held-to-maturity Securities [Line Items]
Severity rate on available-for-sale debt securities in an unrealized loss position	5.00%
Number of credit rating categories, highest | security	4
Debt securities, available-for-sale	$ 5,755,076,000	$ 9,170,849,000
Interest receivable, available-for-sale debt securities	15,868,000	18,788,000
ACL on available-for-sale debt securities	0
Debt securities, held-to-maturity	3,756,634,000	1,199,164,000
Interest receivable, held-to-maturity debt securities	20,618,000	8,737,000
ACL on held-to-maturity debt securities	0	0
Past due
Schedule of Held-to-maturity Securities [Line Items]
Debt securities, available-for-sale	0	0
Debt securities, held-to-maturity	$ 0	$ 0