Segment Information - Net Sales by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 193,288	$ 205,274	$ 220,811	$ 218,025	$ 209,938	$ 197,886	$ 186,413	$ 191,660	$ 837,398	$ 785,897	$ 698,437
Long-Lived Assets	252,851				222,041				252,851	222,041	177,864
Operating lease right-of-use assets	23,116				0				23,116	0
Accounting Standards Update 2016-02
Segment Reporting Information [Line Items]
Operating lease right-of-use assets	23,100								23,100
Technical Nonwovens Segment
Segment Reporting Information [Line Items]
Intercompany sales									21,000	22,200	26,500
United States
Segment Reporting Information [Line Items]
Net sales									478,720	422,222	376,086
Long-Lived Assets	138,265				136,448				138,265	136,448	93,583
France
Segment Reporting Information [Line Items]
Net sales									75,313	66,579	56,214
Long-Lived Assets	13,723				13,219				13,723	13,219	14,268
Germany
Segment Reporting Information [Line Items]
Net sales									124,402	125,796	105,828
Long-Lived Assets	44,116				25,873				44,116	25,873	20,872
United Kingdom
Segment Reporting Information [Line Items]
Net sales									26,556	27,156	24,921
Long-Lived Assets	5,981				4,844				5,981	4,844	4,916
Canada
Segment Reporting Information [Line Items]
Net sales									76,535	87,622	84,701
Long-Lived Assets	29,667				25,614				29,667	25,614	30,739
China
Segment Reporting Information [Line Items]
Net sales									54,036	54,198	47,856
Long-Lived Assets	17,888				11,958				17,888	11,958	11,896
Other
Segment Reporting Information [Line Items]
Net sales									1,836	2,324	2,831
Long-Lived Assets	$ 3,211				$ 4,085				$ 3,211	$ 4,085	$ 1,590