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Segment Information - Net Sales by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]                      
Net sales $ 209,938 $ 197,886 $ 186,413 $ 191,660 $ 178,030 $ 180,041 $ 174,879 $ 165,487 $ 785,897 $ 698,437 $ 566,852
Long-Lived Assets 222,041       177,864       222,041 177,864 166,370
Accounting Standards Update 2017-07                      
Segment Reporting Information [Line Items]                      
Other expense, net                   800 700
Technical Nonwovens Segment                      
Segment Reporting Information [Line Items]                      
Intercompany sales                 22,200 26,500 18,200
United States                      
Segment Reporting Information [Line Items]                      
Net sales                 422,222 376,086 354,371
Long-Lived Assets 136,448       93,583       136,448 93,583 88,918
France                      
Segment Reporting Information [Line Items]                      
Net sales                 66,579 56,214 52,042
Long-Lived Assets 13,219       14,268       13,219 14,268 12,692
Germany                      
Segment Reporting Information [Line Items]                      
Net sales                 125,796 105,828 63,301
Long-Lived Assets 25,873       20,872       25,873 20,872 15,649
United Kingdom                      
Segment Reporting Information [Line Items]                      
Net sales                 27,156 24,921 23,871
Long-Lived Assets 4,844       4,916       4,844 4,916 4,903
Canada                      
Segment Reporting Information [Line Items]                      
Net sales                 87,622 84,701 40,871
Long-Lived Assets 25,614       30,739       25,614 30,739 30,911
China                      
Segment Reporting Information [Line Items]                      
Net sales                 54,198 47,856 30,361
Long-Lived Assets 11,958       11,896       11,958 11,896 11,996
Other                      
Segment Reporting Information [Line Items]                      
Net sales                 2,324 2,831 2,035
Long-Lived Assets $ 4,085       $ 1,590       $ 4,085 $ 1,590 $ 1,301