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v2.4.1.9

Long-Term Debt (Senior Unsecured Debt) (Details) (USD $) | 12 Months Ended | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jul. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2007
Debt Instrument [Line Items] |  |  |  |  |  |
Payment On Senior Unsecured Notes |  | $ 281,490,000 us-gaap_EarlyRepaymentOfSeniorDebt | $ 209,500,000 us-gaap_EarlyRepaymentOfSeniorDebt |  |  |
Loss on early extinguishment of debt |  | 12,100,000 us-gaap_GainsLossesOnExtinguishmentOfDebt | 17,127,000 us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |
Amortization of deferred financing costs | 4,870,000 us-gaap_AmortizationOfFinancingCosts | 5,187,000 us-gaap_AmortizationOfFinancingCosts | 9,086,000 us-gaap_AmortizationOfFinancingCosts |  |  |
Long-term debt | 523,228,000 us-gaap_LongTermDebtNoncurrent | 545,776,000 us-gaap_LongTermDebtNoncurrent |  |  |  |
Senior Unsecured Notes [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Senior Unsecured Notes amount issued |  |  |  |  |  | 550,000,000 us-gaap_DebtInstrumentFaceAmount / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember
Debt instrument interest rate |  |  |  |  |  | 9.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember
Repayments of debt |  |  |  | 275,000,000 us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember | 200,000,000 us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Payment On Senior Unsecured Notes |  |  |  | 282,000,000 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember | 213,500,000 us-gaap_EarlyRepaymentOfSeniorDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Payment of debt extinguishment costs |  |  |  | 6,500,000 us-gaap_PaymentsOfDebtExtinguishmentCosts / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember | 9,500,000 us-gaap_PaymentsOfDebtExtinguishmentCosts / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Interest paid |  |  |  | 500,000 us-gaap_InterestPaid / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember | 4,000,000 us-gaap_InterestPaid / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Loss on early extinguishment of debt |  | 8,600,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |  |  | 11,500,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Amortization of deferred financing costs |  | 2,100,000 us-gaap_AmortizationOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |  |  | 2,000,000 us-gaap_AmortizationOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |
Long-term debt |  |  | $ 275,000,000 us-gaap_LongTermDebtNoncurrent / us-gaap_LongtermDebtTypeAxis = hlx_SeniorUnsecuredNotesMember |  |  |

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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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- Definition The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + 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 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 + Details
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