GOODWILL AND OTHER INTANGIBLE ASSETS - Gross and Net Carrying Amounts of Goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill [Roll Forward]
Gross balance at beginning of period	$ 211,426	$ 209,072
Accumulated impairment	(123,831)	(75,160)
Goodwill	87,595	133,912	$ 196,963
Performance Materials
Goodwill [Roll Forward]
Gross balance at beginning of period	143,659	143,658
Accumulated impairment	(111,671)	(63,000)
Goodwill	31,988	80,658	144,626
Technical Nonwovens
Goodwill [Roll Forward]
Gross balance at beginning of period	55,607	53,254
Accumulated impairment	0	0
Goodwill	55,607	53,254	$ 52,337
Thermal Acoustical Solutions
Goodwill [Roll Forward]
Gross balance at beginning of period	12,160	12,160
Accumulated impairment	(12,160)	(12,160)
Goodwill	$ 0	$ 0