Restructuring - Actual and Estimated Pre-tax Expenses (Details) - Technical Nonwovens $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Restructuring Cost and Reserve [Line Items]
Total estimated expenses	$ 5,000
Expenses incurred through December 31, 2017	662
Estimated remaining expense at December 31, 2017	4,338
Severance and Related Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses	1,200
Expenses incurred through December 31, 2017	181
Estimated remaining expense at December 31, 2017	1,019
Contract Termination Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses	300
Expenses incurred through December 31, 2017	154
Estimated remaining expense at December 31, 2017	146
Facility Exit, Move and Set-up Expenses
Restructuring Cost and Reserve [Line Items]
Total estimated expenses	3,500
Expenses incurred through December 31, 2017	327
Estimated remaining expense at December 31, 2017	$ 3,173