BUSINESS DESCRIPTION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (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	May 28, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 166,527	$ 158,595	$ 161,554	$ 157,029	$ 163,539	$ 155,043	$ 163,687	$ 161,410	$ 643,705	$ 643,679	$ 594,790
Interest rate swap | Designated as Hedging Instrument
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notional amount of derivatives												$ 108,569
Cross-currency swap | Designated as Hedging Instrument
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Notional amount of derivatives												$ 108,569
Accounting Standards Update 2014-09 | Difference between Revenue Guidance in Effect before and after Topic 606
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales										$ 338
HNH
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment charges									$ 1,026