Employee Benefits - Additional Information (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 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	3.50%	4.80%
Fixed Income Funds \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	85.00%
Fixed Income Funds \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	95.00%
Equity Securities \| Minimum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	5.00%
Equity Securities \| Maximum
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percentage)	15.00%

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

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Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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