Employee Benefit Plans Net Periodic Pension (Benefit) Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Interest cost on projected benefit obligation	$ 599
Expected return on plan assets	(531)
Amortization of net actuarial loss	502
Net periodic pension cost	570
Recognized settlement loss	4,061
Total net periodic pension cost	$ 4,631