Restructuring - Accrued Restructuring Costs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2019	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Cash paid	$ (400)
Technical Nonwovens
Restructuring Reserve [Roll Forward]
Balance	147
Pre-tax restructuring expenses, excluding depreciation	376
Cash paid	(379)	$ (3,800)
Balance	$ 144