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Property And Equipment - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Jan. 31, 2015
Dec. 31, 2014
Jan. 31, 2014
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]                  
Proceeds from sale of assets             $ 13,177 $ 17,592 $ 13,574
Note receivable, remaining principal balance $ 10,000 $ 10,000       $ 10,000 10,000 10,000  
Asset impairment charges             0 345,010 0
Gain on disposition of assets, net             $ 1,290 92 $ 10,240
Spoolbase Facility [Member]                  
Property, Plant and Equipment [Line Items]                  
Sales price of property and equipment         $ 45,000        
Proceeds from sale of assets         15,000        
Note receivable         $ 30,000        
Note receivable, interest rate 6.00%           6.00%    
Note receivable, periodic principal payment   10,000 $ 7,500 $ 2,500          
Note receivable, remaining principal balance $ 10,000           $ 10,000    
Helix 534 [Member]                  
Property, Plant and Equipment [Line Items]                  
Sales price of property and equipment 2,800                
Asset impairment charges           205,200   205,200  
Estimated fair value   1,000       1,000   1,000  
Write off of deferred dry dock costs   9,000       9,000   9,000  
Unrecorded gain contingency $ 400           400    
Gain on disposition of assets, net             $ 1,300    
HP I [Member]                  
Property, Plant and Equipment [Line Items]                  
Asset impairment charges           133,400   133,400  
Estimated fair value   $ 124,300       124,300   124,300  
Capitalized Vessel Project Costs [Member]                  
Property, Plant and Equipment [Line Items]                  
Impairment charges to write off capitalized costs           $ 6,300   $ 6,300