CONTINGENCIES - Additional Information (Details) - USD ($)	Mar. 27, 2014	Jun. 21, 2013	Feb. 01, 2013	Dec. 18, 2012	Dec. 17, 2012	Oct. 04, 2012	Dec. 29, 2011	Dec. 22, 2011	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 04, 2014
Loss Contingencies [Line Items]
Accrual									$ 500,000	$ 500,000	$ 700,000	$ 300,000	$ 2,100,000	$ 1,900,000
Loss contingency, range of possible loss, portion not accrued									10,600,000
Brazilian VAT matters
Loss Contingencies [Line Items]
Estimate of possible loss									500,000
Accrual	$ 700,000				$ 3,000,000.0			$ 2,200,000
Damages	$ 500,000	$ 1,100,000	$ 500,000	$ 300,000	$ 2,500,000	$ 800,000	$ 100,000	$ 1,400,000
Brazilian VAT matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss									9,800,000
Accrual									0
Estimate of possible loss, offsetting deposit asset									7,500,000
Cash deposit									700,000
Expected refund of cash deposit									200,000
Tax credit matters
Loss Contingencies [Line Items]
Accrual															$ 1,800,000
Other matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss									$ 800,000