Investment Securities - Additional Information (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security	Dec. 31, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities		$ 64,464,000	$ 48,731,000
Trading debt securities		3,973,000	13,438,000
Accrued interest on investments available for sale		$ 5,900,000	$ 5,600,000
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position | security		687	730
Fair value of debt securities available for sale pledged as collateral		$ 840,300,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years		8 years 4 months 28 days
Provision for credit losses	$ 5,000,000	$ 5,000,000
Impairment loss			$ 0	$ 0
Allowance for credit losses for available for sale debt securities		0	0
Accrued interest on securities held to maturity		$ 13,900,000	$ 13,500,000
Number of security positions in the securities held to maturity portfolio in an unrealized loss position | security		762	802
Fair value of investments held to maturity pledged as collateral		$ 2,600,000,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years		10 years 9 months 14 days
Charge-offs of debt securities		$ 0	$ 0
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]		Accrued interest receivable	Accrued interest receivable