Investment Securities - Additional Information (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($) security	Mar. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) security	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($)
Investments, Debt and Equity Securities [Abstract]
Equity securities	$ 64,464,000		$ 71,513,000	$ 64,464,000
Trading debt securities	3,973,000		0	3,973,000
Accrued interest on investments available for sale	$ 5,900,000		$ 13,100,000	$ 5,900,000
Number of security positions in the debt securities available for sale portfolio in an unrealized loss position | security	687		726	687
Fair value of debt securities available for sale pledged as collateral			$ 1,800,000,000
Weighted-average remaining expected life of residential mortgage-backed securities available for sale, years			8 years 2 months 23 days
Debt Securities, Available-for-Sale, Excluding Accrued Interest, Allowance for Credit Loss, Not Previously Recorded		$ 5,000,000.0
Gross gains			$ 0	$ 869,000	$ 0
Allowance for credit losses for available for sale debt securities	$ 0		0	0
Accrued interest on securities held to maturity	$ 13,900,000		$ 13,000,000	$ 13,900,000
Number of security positions in the securities held to maturity portfolio in an unrealized loss position | security	762		798	762
Fair value of investments held to maturity pledged as collateral			$ 1,200,000,000
Weighted-average remaining expected life of residential mortgage-backed securities held to maturity, years			9 years 4 months 28 days
Charge-offs of debt securities			$ 0	$ 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	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	Accrued interest receivable
Gain on Sale of Investments, Impairment Recognized	$ 869,000		$ 0		$ 0