Other Real Estate Owned - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 8,150,000	$ 6,502,000	$ 8,150,000	$ 6,502,000	$ 8,652,000	$ 9,896,000	$ 6,531,000	$ 5,041,000
Residential consumer mortgage loans in process of foreclosure	3,400,000		3,400,000			2,100,000
Proceeds from sale of internally financed sales of OREO	0	$ 0	0	$ 183,000
Residential Real Estate
Real Estate [Line Items]
Foreclosed real estate properties recorded as result of obtaining physical possession of property	$ 1,100,000		$ 1,100,000			$ 1,500,000