Qualified Affordable Housing (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, 2020	Dec. 31, 2019	Sep. 11, 2019
Schedule of Equity Method Investments [Line Items]
Investment in qualified affordable housing projects	$ 7,400,000		$ 7,400,000			$ 4,800,000
Tax credits to offset amortization expense of investments in affordable housing projects	600,000	$ 700,000	1,100,000	$ 1,500,000
New Qualified Affordable Housing Project
Schedule of Equity Method Investments [Line Items]
Investment in qualified affordable housing projects	5,100,000		5,100,000
New qualified affordable housing project commitment							$ 10,200,000
Forecast | New Qualified Affordable Housing Project
Schedule of Equity Method Investments [Line Items]
Amortization expense of investments in qualified affordable housing projects					$ 0
Tax credits to offset amortization expense of investments in affordable housing projects					$ 0
Noninterest Expense
Schedule of Equity Method Investments [Line Items]
Amortization expense of investments in qualified affordable housing projects	$ 500,000	$ 700,000	$ 1,100,000	$ 1,400,000