VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Era do Brazil Narrative (Details) (USD $)
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12 Months Ended | 0 Months Ended | |||||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jul. 01, 2011
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Schedule of Equity Method Investments [Line Items] | |||||||
Cash paid | $ 125,000us-gaap_PaymentsToAcquireEquityMethodInvestments | $ 0us-gaap_PaymentsToAcquireEquityMethodInvestments | $ 10,627,000us-gaap_PaymentsToAcquireEquityMethodInvestments | ||||
Equity Method Investee [Member] | Era do Brazil [Member] | |||||||
Schedule of Equity Method Investments [Line Items] | |||||||
Notes receivable to related party |
9,200,000us-gaap_NotesReceivableRelatedParties / dei_LegalEntityAxis = era_EradoBrazilMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |
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Number of notes receivable to related parties |
2era_NotesReceivableRelatedPartiesNumberofNotes / dei_LegalEntityAxis = era_EradoBrazilMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember |
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Era do Brazil [Member] | |||||||
Schedule of Equity Method Investments [Line Items] | |||||||
Cash paid |
4,800,000us-gaap_PaymentsToAcquireEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Ownership |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
[1] |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Consideration received |
11,500,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Cash from sale of leased equipment |
9,500,000us-gaap_ProceedsFromSaleOfOtherPropertyPlantAndEquipment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Proceeds from related party debt |
1,600,000us-gaap_ProceedsFromRelatedPartyDebt / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Era do Brazil [Member] | Co-venturer [Member] | |||||||
Schedule of Equity Method Investments [Line Items] | |||||||
Cash paid |
4,800,000us-gaap_PaymentsToAcquireEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_CoVenturerMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Era do Brazil [Member] | Equity Method Investee [Member] | |||||||
Schedule of Equity Method Investments [Line Items] | |||||||
Notes receivable to related party |
$ 10,800,000us-gaap_NotesReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
$ 2,000,000us-gaap_NotesReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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Number of notes receivable to related parties |
2era_NotesReceivableRelatedPartiesNumberofNotes / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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- Definition
Notes Receivable, Related Parties, Number of Notes No definition available.
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- Definition
The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The cash inflow from a long-term borrowing made from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Proceeds from Advances from Affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition
The cash inflow from sale of other property, plant and equipment, used to produce goods or deliver services, and not otherwise defined in the taxonomy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The value of all consideration given or received by the Entity in the significant acquisition or disposal. No definition available.
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