SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)	3 Months Ended			12 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) reportable_segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounting Policies [Line Items]
Number of reportable segments | reportable_segment				3
Non-cash capital expenditures				$ 5,400,000	$ 5,500,000	$ 4,900,000
Foreign and export sales (as a percent)				55.30%	53.10%	53.50%
Export sales				$ 80,200,000	$ 86,300,000	$ 56,800,000
Sales to automotive market (as a percent)				38.50%	42.90%	46.30%
Net sales				$ 764,041,000	$ 837,398,000	$ 785,897,000
Goodwill impairment	$ 48,671,000	$ 48,700,000	$ 63,000,000.0	48,671,000	63,000,000
Capital investments				38,000,000.0
Research and development expense				$ 10,300,000	11,200,000	10,600,000
Cash received from trade receivables sold at time of sale (as a percent)				90.00%
Cash received from trade receivables sold when customer payment received (as a percent)				10.00%
Maximum amount subject to Receivables Purchases Agreements				$ 10,000,000.0
Maximum aggregate amount subject to Receivables Purchases Agreements				50,000,000.0
Asset impairment charges	61,109,000			61,109,000	64,206,000	0
United States
Accounting Policies [Line Items]
Net sales				420,129,000	478,720,000	422,222,000
Funding received for capital investments				13,500,000
France
Accounting Policies [Line Items]
Net sales				79,343,000	75,313,000	66,579,000
Performance Materials
Accounting Policies [Line Items]
Goodwill impairment	48,671,000		63,000,000.0	48,671,000	63,000,000
Asset impairment charges	$ 61,109,000
Trade Receivables
Accounting Policies [Line Items]
Disposal of assets			$ 16,000,000.0	77,400,000	16,000,000.0
Proceeds from sale of trade receivables				71,100,000	14,900,000
Fees related to disposal of trade receivables				$ 400,000	100,000
Maximum | France
Accounting Policies [Line Items]
Proportion of funding received for capital investments (as a percent)				30.00%
Sales Revenue | Customer Concentration Risk | Ford Motor Company
Accounting Policies [Line Items]
Net sales					$ 99,100,000	$ 116,100,000
Concentration risk (as a percent)					11.80%	14.80%