Investment Securities - Additional Information (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($) Security	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Security	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Number of debt securities with unrealized losses | Security	464		464
Available for sale securities, amortized cost	$ 167,903,000		$ 167,903,000		$ 182,027,000
Aggregate depreciation percentage of gross unrealized losses from amortized cost	19.80%		19.80%
Percentage of unrealized dollar loss on amortized cost	28.00%		28.00%
Percentage of unrealized loss on amortized cost	44.10%		44.10%
Unrealized dollar loss of amortized cost basis	$ 2,500,000		$ 2,500,000
Unrealized loss of amortized cost basis	1,000,000		1,000,000
Accrued interest receivable on held to maturity securities	2,000,000		2,000,000		2,200,000
Write-offs of accrued interest receivable on held to maturity securities	0	$ 0	0	$ 0
Securities held on contractual payments	0		0		0
Securities placed on non-accrual status	0		0		0
Net proceeds from securities sold	0	$ 0	0	$ 0
Asset Pledged As Collateral
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, amortized cost					9,100,000
Security held as collateral, fair value	$ 0		$ 0		$ 8,000,000