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VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Aeroleo Narrative (Details) (USD $)
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0 Months Ended | 12 Months Ended | |||||||||
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Mar. 02, 2012
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Jul. 01, 2011
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Dec. 31, 2014
helicopter
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Dec. 31, 2013
helicopter
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Dec. 31, 2012
helicopter
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Jul. 01, 2011
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| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Voting ownership percentage | 50.00%era_EquityMethodInvestmentVotingOwnershipPercentage | ||||||||||
| Payments to Acquire Equity Method Investments | 125,000us-gaap_PaymentsToAcquireEquityMethodInvestments | 0us-gaap_PaymentsToAcquireEquityMethodInvestments | $ 10,627,000us-gaap_PaymentsToAcquireEquityMethodInvestments | ||||||||
| Recognized impairment charge | 0us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment | 0us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment | |||||||||
| Era do Brazil [Member] | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Ownership |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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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| Payments to Acquire Equity Method Investments |
4,800,000us-gaap_PaymentsToAcquireEquityMethodInvestments / 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 |
2,000,000us-gaap_NotesReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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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| Aeroleo [Member] | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Ownership |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
[2] |
50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Voting ownership percentage |
20.00%era_EquityMethodInvestmentVotingOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
20.00%era_EquityMethodInvestmentVotingOwnershipPercentage / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Payments to Acquire Equity Method Investments |
4,800,000us-gaap_PaymentsToAcquireEquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Recognized impairment charge |
5,900,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
5,900,000us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Number of helicopters leased |
11era_EquityMethodInvestmentNumberofHelicoptersLeased / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
11era_EquityMethodInvestmentNumberofHelicoptersLeased / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
11era_EquityMethodInvestmentNumberofHelicoptersLeased / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Aeroleo [Member] | Equity Method Investee [Member] | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Notes receivable to related party |
6,000,000us-gaap_NotesReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
6,000,000us-gaap_NotesReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Notes receivable interest rate |
6.00%us-gaap_RelatedPartyTransactionRate / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Revenue from related parties |
16,700,000us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
16,200,000us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
17,600,000us-gaap_RevenueFromRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Accounts receivable related parties |
31,000,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
21,000,000us-gaap_AccountsReceivableRelatedParties / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Co-venturer [Member] | Era do Brazil [Member] | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Payments to Acquire Equity Method Investments |
4,800,000us-gaap_PaymentsToAcquireEquityMethodInvestments / dei_LegalEntityAxis = us-gaap_CoVenturerMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_EradoBrazilMember |
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| Co-venturer [Member] | Aeroleo [Member] | Equity Method Investee [Member] | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Notes receivable to related party |
$ 6,000,000us-gaap_NotesReceivableRelatedParties / dei_LegalEntityAxis = us-gaap_CoVenturerMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
6,000,000us-gaap_NotesReceivableRelatedParties / dei_LegalEntityAxis = us-gaap_CoVenturerMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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| Notes receivable interest rate |
6.00%us-gaap_RelatedPartyTransactionRate / dei_LegalEntityAxis = us-gaap_CoVenturerMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_EquityMethodInvesteeMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_AeroleoMember |
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- Definition
Equity Method Investment, Number of Helicopters Leased No definition available.
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- Definition
Equity Method Investment, Voting Ownership Percentage No definition available.
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- Definition
For an unclassified balance sheet, amount of receivables arising from transactions with related parties. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties. No definition available.
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- Definition
Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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