GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, gross		$ 211,426
Accumulated impairment		(123,831)
Goodwill	$ 87,842	87,595
Goodwill [Roll Forward]
Balance at beginning of period	87,595
Foreign currency translation	247
Balance at end of period	87,842
Performance Materials
Goodwill [Line Items]
Goodwill, gross		143,659
Accumulated impairment		(111,671)
Goodwill	31,971	31,988
Goodwill [Roll Forward]
Balance at beginning of period	31,988
Foreign currency translation	(17)
Balance at end of period	31,971
Technical Nonwovens
Goodwill [Line Items]
Goodwill, gross		55,607
Accumulated impairment		0
Goodwill	55,871	55,607
Goodwill [Roll Forward]
Balance at beginning of period	55,607
Foreign currency translation	264
Balance at end of period	55,871
Thermal Acoustical Solutions
Goodwill [Line Items]
Goodwill, gross		12,160
Accumulated impairment		(12,160)
Goodwill	0	$ 0
Goodwill [Roll Forward]
Balance at beginning of period	0
Foreign currency translation	0
Balance at end of period	$ 0