Employee Benefit Plans - Schedule of Net Benefit Costs (Details) - Pension and Other Postretirement Plans, Defined Benefit - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 112	$ 106
Interest cost	1,014	1,322
Expected return on assets	(1,681)	(1,531)
Amortization of prior service cost	13	13
Amortization of actuarial loss	12	10
Net periodic pension and postretirement benefit credit	(530)	(80)
Contributions paid	$ 0	$ 0