Employee Benefits - Additional Information (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Service costs included in net periodic pension expense	$ 0
Expected long-term rate of return on plan assets	3.45%	4.80%
Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	90.00%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	10.00%