Employee Benefit Plans - Discount Rate Change, Projected Benefit Obligation (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Retirement Benefits [Abstract]
Impact on projected benefit obligation, discount rate, 0.5% decrease	$ 7,481
Impact on projected benefit obligation, discount rate, 0.5% increase	(6,485)
Impact on projected benefit obligation, future pension increase 0.5% decrease	(9,496)
Impact on projected benefit obligation, future pension increase, 0.5% increase	$ 10,526