Impairment, Restructuring and Other Charges - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			$ 60,043,000	$ 0	$ 0
Severance costs			7,324,000
Inventory write-down			32,070,000
Long-lived asset impairment	$ 38,600,000		14,902,000
Restructuring costs			5,700,000
Impairments			38,559,000	$ 0	0
Restructuring charges		$ 0	12,624,000		$ 0
Inventory
Restructuring Cost and Reserve [Line Items]
Restructuring charges			33,600,000
Property, Plant and Equipment
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 27,400,000