Costs Associated with Exit and Restructuring Activities - Additional Information (Details) $ in Thousands	12 Months Ended			21 Months Ended	31 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 position	Dec. 31, 2018 USD ($) position
Restructuring charges
Restructuring Charges	$ 5,062	$ 4,139	$ 3,048
April 2014 Plan and June 2016 Plan | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring Costs	5,062	4,139	3,048
June2016 Plan
Restructuring charges
Elimination of workforce | position					230
June2016 Plan | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	13,400				$ 13,400
Restructuring charges
Restructuring Charges	4,559	4,139	3,048
June2016 Plan | Workforce reduction | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	3,075				3,075
April 2014 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	9,950				9,950
Restructuring charges
Restructuring Charges	503	$ 0	$ 4,923
Elimination of workforce | position				120
April 2014 Plan | Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	4,050				4,050
April 2014 Plan | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	5,900				5,900
April 2014 Plan | Other charges, including pension termination costs | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	1,700				1,700
April 2014 Plan | Workforce reduction | Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 4,200				$ 4,200