Investments in Securities - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Accrued interest on held to maturity securities	$ 358,000		$ 358,000		$ 310,000
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest Receivable		Interest Receivable		Interest Receivable
Accrued interest on available for sale securities	$ 9,000		$ 9,000		$ 58,000
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Interest Receivable		Interest Receivable		Interest Receivable
Held-to-maturity securities, write-offs of accrued interest income	$ 0	$ 0	$ 0	$ 0
Held-to-maturity securities, delinquent amount	0		0		$ 0
Available for-sale-securities	4,163,000		4,163,000		5,003,000
Available-for-sale securities, credit loss	0	0	0	0	0
Available-for-sale securities, write-offs of accrued interest income	0	0	0	0
Available-for-sale securities, nonaccrual status	0	0	0	0
Sale of securities	0	$ 0	0	$ 0
FHLB | Loans Pledged
Schedule Of Available For Sale Securities [Line Items]
Pledged securities	58,100,000		58,100,000		62,600,000
FRB | Loans Pledged
Schedule Of Available For Sale Securities [Line Items]
Pledged securities	$ 16,000,000		$ 16,000,000		$ 0