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v2.4.1.9

Long-Term Debt (Convertible Senior Notes Due 2025 and Other) (Details) (USD $) | 12 Months Ended | 1 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Feb. 28, 2013 | Dec. 31, 2012 | Mar. 31, 2012 | Mar. 31, 2005
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt, carrying value | $ 572,292,000 us-gaap_DebtInstrumentCarryingAmount | $ 592,668,000 us-gaap_DebtInstrumentCarryingAmount |  |  |  |  |
Amortization of deferred financing costs | 4,870,000 us-gaap_AmortizationOfFinancingCosts | 5,187,000 us-gaap_AmortizationOfFinancingCosts | 9,086,000 us-gaap_AmortizationOfFinancingCosts |  |  |  |
Loss on early extinguishment of debt |  | 12,100,000 us-gaap_GainsLossesOnExtinguishmentOfDebt | 17,127,000 us-gaap_GainsLossesOnExtinguishmentOfDebt |  |  |  |
Repayment of Helix Term Notes | 15,000,000 us-gaap_RepaymentsOfSecuredDebt | 374,681,000 us-gaap_RepaymentsOfSecuredDebt | 12,569,000 us-gaap_RepaymentsOfSecuredDebt |  |  |  |
Amortization of debt discount | 5,596,000 us-gaap_AmortizationOfDebtDiscountPremium | 5,172,000 us-gaap_AmortizationOfDebtDiscountPremium | 9,729,000 us-gaap_AmortizationOfDebtDiscountPremium |  |  |  |
Deferred financing costs | 3,586,000 us-gaap_PaymentsOfFinancingCosts | 10,954,000 us-gaap_PaymentsOfFinancingCosts | 7,580,000 us-gaap_PaymentsOfFinancingCosts |  |  |  |
Convertible Senior Notes 2025 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt, carrying value |  |  |  |  |  |  | 300,000,000 us-gaap_DebtInstrumentCarryingAmount / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember
Debt instrument interest rate |  |  |  |  |  |  | 3.25%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember
Debt instrument issued percentage |  |  |  |  |  |  | 100.00%hlx_DebtInstrumentIssuedPercentageToPrincipalAmount / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember
Effective interest rate |  |  |  |  |  |  | 6.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember
Debt instrument, repurchase amount |  |  |  |  |  | 142,200,000 us-gaap_DebtInstrumentRepurchaseAmount / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Repayments of debt |  |  |  |  |  | 145,100,000 us-gaap_RepaymentsOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Interest paid |  |  |  |  |  | 1,100,000 us-gaap_InterestPaid / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Payment of debt extinguishment costs |  |  |  |  |  | 1,800,000 us-gaap_PaymentsOfDebtExtinguishmentCosts / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Amortization of deferred financing costs |  |  |  |  |  | 300,000 us-gaap_AmortizationOfFinancingCosts / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Loss on early extinguishment of debt |  |  |  |  |  | 5,600,000 us-gaap_GainsLossesOnExtinguishmentOfDebt / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |
Repayment of Helix Term Notes |  |  |  | 3,500,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember | 154,300,000 us-gaap_RepaymentsOfSecuredDebt / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |  |
Amortization of debt discount |  |  |  |  |  | $ 3,500,000 us-gaap_AmortizationOfDebtDiscountPremium / us-gaap_LongtermDebtTypeAxis = hlx_ConvertibleSeniorNotesMember |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 + Details
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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 Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 2: 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 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -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 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12317-112629 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6850294&loc=d3e12355-112629 + Details
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- Definition The cash outflow for loan and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt. + 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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