Investment Securities - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($) security	Dec. 31, 2020 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 45,684,000	$ 38,528,000
Marketable securities at fair value	2,990,000	3,367,000
Equity securities without readily determinable market value	22,496,000	8,868,000
Trade date receivable - securities	0	0
Net (loss) gain on change in fair value and sale of equity securities	(377,000)	198,000	$ 296,000
Allowance for credit losses for investments	$ 0	$ 0
Number of securities in securities portfolio | security	503	511
Number of securities in securities portfolio, unrealized loss position | security	454	80
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ (1,440,001,000)	$ (1,030,914,000)
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Securities pledged	1,191,021,000	1,226,646,000
Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	5,470,000	5,051,000
Increase (decrease) in debt securities, available for sale	(239,115,000)	(29,825,000)
Debt Securities, Available-for-Sale, Unrealized Loss Position	$ (234,388,000)
Unrealized gain position		$ 4,727,000	$ 34,552,000