Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL INFORMATION FOR STATEMENTS OF CASH FLOWS Schedule of Supplemental Cash Flow Disclosures (Details)

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SUPPLEMENTAL INFORMATION FOR STATEMENTS OF CASH FLOWS Schedule of Supplemental Cash Flow Disclosures (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Supplemental Cash Flow Elements [Abstract]      
Benefit of net tax operating losses cash purchased by SEACOR $ 0era_BenefitofNetTaxOperatingLossCashPurchasedbyAffiliate $ 0era_BenefitofNetTaxOperatingLossCashPurchasedbyAffiliate $ 1,961era_BenefitofNetTaxOperatingLossCashPurchasedbyAffiliate
Income taxes paid, net of refunds 1,825us-gaap_IncomeTaxesPaidNet 20us-gaap_IncomeTaxesPaidNet 143us-gaap_IncomeTaxesPaidNet
Interest paid to others, excluding capitalized interest 13,420era_InterestPaidtoOthersNet 17,839era_InterestPaidtoOthersNet 7,821era_InterestPaidtoOthersNet
Schedule of non-cash investing and financing activities:      
Company financed sale of equipment and parts 0era_SaleofPropertyPlantandEquipmentwithNotesIssued 0era_SaleofPropertyPlantandEquipmentwithNotesIssued 350era_SaleofPropertyPlantandEquipmentwithNotesIssued
Non-cash distribution from Era do Brazil of a note receivable 0era_NoncashDistributiontoAffiliateNoteReceivable 0era_NoncashDistributiontoAffiliateNoteReceivable 4,618era_NoncashDistributiontoAffiliateNoteReceivable
Settlement of Series B Preferred Stock in exchange for net tax operating losses $ 0era_SettlementofSeriesBpreferredStockExchangeforNetTaxOperatingLosses $ 0era_SettlementofSeriesBpreferredStockExchangeforNetTaxOperatingLosses $ 50,000era_SettlementofSeriesBpreferredStockExchangeforNetTaxOperatingLosses