Investment Securities - Additional Information (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) position	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) position	Dec. 31, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 50,152,000		$ 48,731,000
Trading debt securities	6,855,000		$ 13,438,000
Debt securities, trading, realized gain	$ 402,000
Debt securities, trading, realized loss		$ (1,100,000)
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position | position	715		730
Fair value of debt securities available for sale pledged as collateral	$ 870,400,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years	8 years 10 months 28 days
Accrued interest on investments available for sale	$ 5,100,000		$ 5,600,000
Accrued interest on securities held to maturity	12,700,000		$ 13,500,000
Provision for credit losses	$ 5,000,000
Impairment loss		0
Number of security positions in the securities held to maturity portfolio in an unrealized loss position | position	766		802
Fair value of investments held to maturity pledged as collateral	$ 2,500,000,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years	11 years 8 months 1 day
Allowance for Credit Losses	$ 1,633,000	1,222,000	$ 1,646,000	$ 1,165,000
Provision for credit losses for available for sale and held to maturity securities	$ (13,000)	$ 57,000