Investment in Affordable Housing Projects - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items]
Year in which investments are expected to be paid			2023		2023
Tax credits and other benefits recognized			$ 234,000	$ 276,000
Losses from investments in affordable housing projects	$ 123,100	$ 60,000	228,400	$ 143,300
Other Assets [Member]
Schedule Of Equity Method Investments [Line Items]
Investments in affordable housing projects	4,000,000.0		4,000,000.0		$ 4,200,000
Other Liabilities [Member]
Schedule Of Equity Method Investments [Line Items]
Capital call for investments in affordable housing projects	$ 717,000		$ 717,000		$ 749,000