INCOME TAXES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Impairment of goodwill and other long-lived assets	$ 61,109				$ 61,109	$ 64,206	$ 0
Change in valuation allowance					3,000		$ 600
Tax benefit related to reclassification of stranded tax effects				$ 4,500	1,800
Net operating loss carrybacks realized due to the CARES Act					1,100
Goodwill impairment	$ 48,671	$ 48,700	$ 63,000		$ 48,671	$ 63,000
Effective tax rate for income from continuing operations (as a percent)					8.50%	8.30%	19.50%
Undistributed earnings of foreign subsidiaries					$ 3,700
Reasonably expected net unrecognized benefits may be recognized					100
Total amount of net unrecognized tax benefits that would affect the effective tax rate if recognized					1,700
Amount of unrecognized tax benefit, if recognized, would be offset					200
Income tax penalties and interest accrued related to unrecognized tax benefits			$ 200		100	$ 200
State
Income Taxes [Line Items]
Operating loss carryforward					4,000
State tax credit carry forwards that expire between 2019 and 2033					1,700
Foreign | China
Income Taxes [Line Items]
Operating loss carryforward					7,300
Foreign | Germany
Income Taxes [Line Items]
Operating loss carryforward					23,700
Foreign | Netherlands
Income Taxes [Line Items]
Operating loss carryforward					900
Foreign | France
Income Taxes [Line Items]
Operating loss carryforward					300
Foreign | India
Income Taxes [Line Items]
Operating loss carryforward					2,000
Maximum
Income Taxes [Line Items]
Estimated income tax expense (benefit) from repatriation tax					$ 500