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Summary Of Significant Accounting Policies (Recertification Costs And Deferred Dry Dock Charges - Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Deferred dry dock expenses, net $ 11,631,000hlx_DeferredDrydockExpensesNet $ 20,833,000hlx_DeferredDrydockExpensesNet  
Accumulated Amortization Deferred Drydock 7,500,000hlx_AccumulatedAmortizationDeferredDrydock 14,500,000hlx_AccumulatedAmortizationDeferredDrydock  
Drydock amortization expense $ 14,100,000hlx_DrydockAmortizationExpense $ 14,800,000hlx_DrydockAmortizationExpense $ 8,600,000hlx_DrydockAmortizationExpense
Minimum [Member]      
Drydock Amortization Period 30 months    
Drydock Recertification Process Period 1 month    
Maximum [Member]      
Drydock Amortization Period 60 months    
Drydock Recertification Process Period 2 months