Restructuring - Narrative (Details) - Technical Nonwovens - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Apr. 30, 2017
Restructuring Cost and Reserve [Line Items]
Estimated pre-tax restructuring expense		$ 5,000
Restructuring, expected costs resulting in future cash expenditures			$ 4,800
Cash paid		177
Pre-tax restructuring expenses, excluding depreciation		700
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation		400
Selling, Product Development and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation		$ 300
Forecast
Restructuring Cost and Reserve [Line Items]
Cash paid	$ 3,500
Minimum | Forecast
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation	3,500
Maximum | Forecast
Restructuring Cost and Reserve [Line Items]
Pre-tax restructuring expenses, excluding depreciation	$ 4,000