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IMPAIRMENT OF INVESTMENT IN BOA VISTA SERVICOS (Details) BRL in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2015 BRL | Jun. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) | Mar. 31, 2015 BRL
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |
Investment in Boa Vista Servicos S.A. (BVS) | BRL | BRL 44.0 |  |  |  |  | BRL 90.0
Cost-method Investments, Other than Temporary Impairment | BRL 46.0 |  | $ 14.8 | $ 0.0 |  |
Cumulative Translation Adjustment |  |  |  |  | $ 36.4 |
Boa Vista Servicos Sociedad Anonima [Member] |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired | 15.00% |  |  |  | 15.00% |
Boa Vista Servicos Sociedad Anonima [Member] |  |  |  |  |  |
Schedule of Cost-method Investments [Line Items] |  |  |  |  |  |
Investment in Boa Vista Servicos S.A. (BVS) |  |  |  |  | $ 14.1 |
Cost-method Investments, Other than Temporary Impairment |  | $ 14.8 |  |  |  |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6872867&loc=d3e40691-111596 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 35 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=29638308&loc=d3e40346-111594 + Details
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