Business Reorganizations (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) facility
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Number of facilities eliminated | facility		2
Curtailment gain	$ 7,217	$ 7,217
Settlement gain (loss)		230
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		3,796
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 3,664