Investment Securities - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) position	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) position	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) position
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 43,318,000		$ 43,318,000		$ 36,473,000
Trading debt securities	$ 4,100,000		4,100,000		$ 38,130,000
Debt securities, trading, realized loss			$ 1,200,000	$ 705,000
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position | position	743		743		139
Fair value of debt securities available for sale pledged as collateral	$ 348,100,000		$ 348,100,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years			6 years 7 months 6 days
Impairment loss	0	$ 0	$ 0	0
Available for sale debt securities, allowance for credit losses	$ 0		$ 0		$ 0
Number of security positions in the securities held to maturity portfolio in an unrealized loss position | position	826		826		108
Fair value of investments held to maturity pledged as collateral	$ 619,500,000		$ 619,500,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years			8 years 9 months 18 days
Allowance for credit losses, excluding accrued interest	1,696,000		$ 1,696,000		$ 1,165,000
Provision (credit) for credit losses for held to maturity securities	$ 188,000	$ 35,000	$ 531,000	$ (353,000)