Restructuring - Accrued Restructuring Costs (Details) - Technical Nonwovens - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Balance	$ 333
Pre-tax restructuring expenses, excluding depreciation	469
Cash paid	(320)	$ (3,500)
Balance	$ 482	$ 333