Debt Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($)
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	$ 4,629,073,000	$ 4,785,719,000
Interest receivable, available-for-sale debt securities	9,315,000	9,319,000
ACL on available-for-sale debt securities	0
Debt securities, held-to-maturity	3,451,583,000	3,502,411,000
Interest receivable, held-to-maturity debt securities	21,685,000	16,990,000
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