CONTINGENCIES - Additional Information (Details) - USD ($)	Nov. 24, 2018	Oct. 18, 2018	Sep. 11, 2017	Jun. 09, 2016	Dec. 15, 2015	Dec. 04, 2015	Sep. 04, 2014	Jul. 31, 2014	Jul. 01, 2014	Jun. 26, 2014	Apr. 17, 2014	Mar. 27, 2014	Jun. 20, 2013	Feb. 01, 2013	Dec. 18, 2012	Dec. 17, 2012	Oct. 04, 2012	Dec. 29, 2011	Dec. 22, 2011	Apr. 16, 2009	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Loss Contingencies [Line Items]
Accrual																					$ 1,900,000	$ 1,900,000	$ 0	$ 400,000
Loss contingency, range of possible loss, portion not accrued																					16,000,000.0
Brazilian VAT matters
Loss Contingencies [Line Items]
Accrual		$ 3,100,000				$ 4,300,000
Damages	$ 3,100,000	$ 2,000,000.0		$ 800,000		$ 3,500,000		$ 3,100,000		$ 600,000	$ 1,500,000	$ 800,000	$ 2,000,000.0	$ 100,000	$ 400,000	$ 3,500,000	$ 1,200,000	$ 100,000	$ 2,000,000.0	$ 1,500,000
Improperly offset social contribution					$ 100,000				$ 100,000
Brazilian VAT matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss																					15,000,000.0
Accrual																					0
Estimate of possible loss, offsetting deposit asset																					13,900,000
Tax credit matters
Loss Contingencies [Line Items]
Accrual							$ 2,500,000
Damages			$ 200,000				$ 1,800,000
Other matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss																					$ 1,000,000.0