VARIABLE INTEREST ENTITIES AND EQUITY INVESTMENTS AND ADVANCES Schedule of Equity Method Investment, Financial Information, Balance Sheets (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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Dart Helicopter Services LLC [Member] | ||
Schedule of Equity Method Investments [Line Items] | ||
Current assets |
$ 22,447us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
$ 19,231us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
Non-current assets |
34,309us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
37,636us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
Current liabilities |
4,386us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
8,613us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
Non-current liabilities |
8,907us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
6,963us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = era_DartHelicopterServicesLLCMember |
Other Investments [Member] | ||
Schedule of Equity Method Investments [Line Items] | ||
Current assets |
1,151us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
4,378us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
Non-current assets |
5,899us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
20,018us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
Current liabilities |
465us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
2,789us-gaap_EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
Non-current liabilities |
$ 4,298us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
$ 7,918us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = us-gaap_OtherInvestmentsMember |
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- Definition
The amount of current assets reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of current liabilities reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of noncurrent assets reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of noncurrent liabilities reported by an equity method investment of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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