Restructuring - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]
Asset impairments	$ 9,700	$ 9,680	$ 0
Definite-lived intangible assets	7,100
Restructuring reserve	3,280	$ 3,280		$ 6,170
Property, plant and equipment
Restructuring Cost and Reserve [Line Items]
Asset impairments	2,000
Building right-of-use asset
Restructuring Cost and Reserve [Line Items]
Asset impairments	600
Customer relationships
Restructuring Cost and Reserve [Line Items]
Definite-lived intangible assets	6,100
Unpatented technology
Restructuring Cost and Reserve [Line Items]
Definite-lived intangible assets	$ 1,000