Investment Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) security	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	$ 44,737,000		$ 45,684,000
Trade date payable - securities	245,000	$ 0	0
Allowance for credit losses for investments	$ 0		$ 0
Number of securities in securities portfolio | security	506		503
Number of securities in securities portfolio, unrealized loss position | security	409		454
Unrealized loss position	$ 1,404,929,000		$ 1,440,001,000
Marketable securities at fair value	3,059,000		2,990,000
Equity securities without readily determinable market value	22,483,000		22,496,000
Federal Home Loan Bank stock, at cost	43,369,000		58,641,000
Net (loss) gain on change in fair value and sale of equity securities	69,000	(154,000)
Collateral Pledged
Debt and Equity Securities, FV-NI [Line Items]
Securities pledged	1,184,836,000		1,191,021,000
Debt Securities
Debt and Equity Securities, FV-NI [Line Items]
Accrued interest receivable	5,399,000		5,470,000
Increase (decrease) in debt securities, available for sale	27,123,000	(105,660,000)
Unrealized loss position	$ 207,265,000	$ 100,933,000	$ 234,388,000
Unrealized gain position				$ 4,727,000