| IMPAIRMENT OF INVESTMENT IN BOA VISTA SERVICOS (Details) BRL in Millions, $ in Millions | Jun. 30, 2016  BRL | Jun. 30, 2016  USD ($) | Dec. 31, 2015  BRL | 
|---|---|---|---|
| Schedule of Cost-method Investments [Line Items] | |||
| Investment in Boa Vista Servicos S.A. (BVS) | BRL 44 | $ 13.0 | BRL 44 | 
| Cumulative Translation Adjustment | $ 37.5 | ||
| Boa Vista Servicos Sociedad Anonima | |||
| Schedule of Cost-method Investments [Line Items] | |||
| Business acquisition, percentage of voting interests acquired | 15.00% | 15.00% | 
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- Definition Cumulative Translation Adjustment balance in Accumulated Other Comprehensive Income No definition available. 
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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