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Details Of Certain Accounts (Other Current Assets) (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Note receivable |  |  | $ 10,000,000 us-gaap_NotesAndLoansReceivableGrossCurrent | [1] | $ 17,500,000 us-gaap_NotesAndLoansReceivableGrossCurrent | [1]
Other receivables |  |  | 613,000 us-gaap_OtherReceivablesNetCurrent |  | 423,000 us-gaap_OtherReceivablesNetCurrent |
Prepaid insurance |  |  | 3,523,000 us-gaap_PrepaidInsurance |  | 6,582,000 us-gaap_PrepaidInsurance |
Other prepaids |  |  | 8,631,000 us-gaap_OtherPrepaidExpenseCurrent |  | 15,541,000 us-gaap_OtherPrepaidExpenseCurrent |
Spare parts inventory |  |  | 2,112,000 us-gaap_Supplies |  | 1,857,000 us-gaap_Supplies |
Value added tax receivable |  |  | 8,046,000 us-gaap_ValueAddedTaxReceivableCurrent |  | 9,326,000 us-gaap_ValueAddedTaxReceivableCurrent |
Other |  |  | 91,000 us-gaap_OtherAssetsMiscellaneousCurrent |  | 72,000 us-gaap_OtherAssetsMiscellaneousCurrent |
Total other current assets |  |  | 33,016,000 us-gaap_OtherAssetsCurrent |  | 51,301,000 us-gaap_OtherAssetsCurrent |
Note receivable, interest rate |  |  | 6.00%hlx_NotesReceivableInterestStatedRatePercentage |  |  |
Financing receivable, gross |  |  | 20,000,000 us-gaap_NotesReceivableGross |  |  |
Scenario, Forecast [Member] |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Note receivable, periodic principal payment | $ 10,000,000 us-gaap_ProceedsFromCollectionOfNotesReceivable / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember | $ 10,000,000 us-gaap_ProceedsFromCollectionOfNotesReceivable / us-gaap_StatementScenarioAxis = us-gaap_ScenarioForecastMember |  |  |  |
[1] | Relates to the remaining balance of the promissory note we received in connection with the sale of our Ingleside spoolbase in January 2014. Interest on the note is payable quarterly at a rate of 6% per annum. Under the terms of the note, the remaining $20 million principal balance is required to be paid with a $10 million payment on December 31 of 2015 and 2016, respectively.

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