Segment Information - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Net sales	$ 698,437	$ 566,852	$ 524,505
Long-Lived Assets	177,864	166,370	116,717
United States
Segment Reporting Information [Line Items]
Net sales	376,086	354,371	344,950
Long-Lived Assets	93,583	88,918	76,502
France
Segment Reporting Information [Line Items]
Net sales	56,214	52,042	47,495
Long-Lived Assets	14,268	12,692	12,899
Germany
Segment Reporting Information [Line Items]
Net sales	105,828	63,301	68,861
Long-Lived Assets	20,872	15,649	10,149
United Kingdom
Segment Reporting Information [Line Items]
Net sales	24,921	23,871	26,598
Long-Lived Assets	4,916	4,903	6,399
Canada
Segment Reporting Information [Line Items]
Net sales	84,701	40,871	0
Long-Lived Assets	30,739	30,911	0
China
Segment Reporting Information [Line Items]
Net sales	47,856	30,361	33,885
Long-Lived Assets	11,896	11,996	9,953
Other
Segment Reporting Information [Line Items]
Net sales	2,831	2,035	2,716
Long-Lived Assets	1,590	1,301	815
Technical Nonwovens Segment
Segment Reporting Information [Line Items]
Intercompany sales	$ 26,500	$ 18,200	$ 13,800