Employee Benefit Plans - Weighted Average Actuarial Assumptions Used To Determine Net Periodic Benefit Cost (Details) - Weighted Average	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.75%	4.00%	3.25%
Rate of future compensation increase	2.90%	2.90%	2.90%