Securities - Additional Information (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) loan	Dec. 31, 2022 USD ($)
Securities [Line Items]
Proceeds from sale of available-for-sale securities	$ 0	$ 0	$ 0	$ 0
Number of securities | loan	86		86
Number of securities in unrealized loss position | loan	82		82
Debt securities issued by US government sponsored agencies (percent)	97.00%		97.00%
Debt securities that are tax exempt municipal securities (percent)	3.00%		3.00%
Equity investment in mutual fund with readily determinable fair value	$ 3,500,000	3,300,000	$ 3,500,000	3,300,000
Unrealized holding gain (losses) of mutual fund			48,000	(431,000)
Collateral Pledged
Securities [Line Items]
Number of securities pledged as collateral	$ 0	$ 0	$ 0	$ 0