Investment Securities - Additional Information (Details)	Dec. 31, 2019 USD ($) Security	Dec. 31, 2018 USD ($) Security
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Number of debt securities with unrealized losses | Security	68	142
Aggregate depreciation percentage of gross unrealized losses from amortized cost	0.74%	2.05%
Maximum
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Percentage of unrealized loss on amortized cost	3.15%	9.79%
Unrealized loss of amortized cost basis	$ 63,000	$ 98,000
Unrealized dollar loss of amortized cost basis	$ 96,000	$ 189,000
Percentage of unrealized dollar loss on amortized cost	1.93%	5.34%