Investment Securities - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities without readily determinable fair value	$ 64,100		$ 64,100
Upward adjustments of equity securities without readily determinable fair values	0	$ 0	0	$ 0
Downward adjustments of equity securities without readily determinable fair values	0	0	0	0
Impairment of equity securities without readily determinable fair values	0	489	3,731	489
Pledged securities	$ 7,200,000	$ 7,100,000	$ 7,200,000	$ 7,100,000	$ 6,900,000
Number of securities by a single non-government sponsored issuer exceeding 10% of shareholders' equity | security	0		0