CONTINGENCIES - Additional Information (Details)	Feb. 14, 2018 USD ($)	Sep. 11, 2017 USD ($)	Jun. 09, 2016 USD ($)	Dec. 15, 2015 USD ($)	Dec. 04, 2015 USD ($)	Sep. 04, 2014 USD ($) assessment	Jul. 31, 2014 USD ($)	Jul. 01, 2014 USD ($)	Jun. 26, 2014 USD ($)	Jun. 05, 2014 USD ($)	Apr. 17, 2014 USD ($)	Mar. 27, 2014 USD ($)	Jun. 21, 2013 USD ($)	Feb. 01, 2013 USD ($)	Dec. 18, 2012 USD ($)	Dec. 17, 2012 USD ($)	Oct. 04, 2012 USD ($)	Dec. 30, 2011 USD ($)	Dec. 22, 2011 USD ($)	Apr. 16, 2009 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jul. 31, 2016 person
Loss Contingencies [Line Items]
Traffic accident, number of deaths | person																											2
Insurance receivables																					$ 900,000		$ 43,000,000
Accrual																					0	$ 0	400,000	$ 3,400,000	$ 3,200,000	$ 3,200,000
Loss contingency, range of possible loss, portion not accrued																					21,000,000
Insurance claims
Loss Contingencies [Line Items]
Litigation, amount awarded to other party	$ 5,000,000
Settlement amount to be paid by insurance carriers	$ 48,000,000
Insurance receivables																							43,000,000
Estimate of possible loss																							$ 43,000,000
Brazilian VAT matters
Loss Contingencies [Line Items]
Litigation, amount awarded to other party										$ 500,000
Damages			$ 800,000		$ 3,400,000		$ 3,100,000		$ 600,000		$ 1,500,000	$ 800,000	$ 2,100,000	$ 100,000	$ 400,000	$ 3,400,000	$ 1,200,000	$ 100,000	$ 1,900,000	$ 1,500,000
Improperly offset social contribution				$ 100,000				$ 100,000
Brazilian VAT matters | Bonds
Loss Contingencies [Line Items]
Damages					$ 4,000,000
Amount secured with a bond												$ 900,000
Brazilian VAT matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss																					18,400,000
Accrual																					0
Estimate of possible loss, offsetting deposit asset																					10,600,000
Tax credit matters
Loss Contingencies [Line Items]
Damages		$ 200,000				$ 2,300,000
Tax credit matters | Pending litigation
Loss Contingencies [Line Items]
Additional assessments issued | assessment						5
Other matters | Pending litigation
Loss Contingencies [Line Items]
Estimate of possible loss																					$ 2,600,000