Restructuring - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ 179
Restructuring reserve recorded in accrued and other current liabilities	1,900
Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred	$ 200
Cost of Sales And Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred		$ 100