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Investments in and Advances to Equity Accounted Investments - Summary of the Company’s Financial Information for Equity Accounted Investments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Equity Accounted Investments [Member]      
Schedule of Equity Method Investments [Line Items]      
Revenues $ 169,631 $ 234,398 $ 104,096
Income from operations 62,998 112,542 19,259
Realized and unrealized loss on derivative instruments (244) (689) (831)
Net income 39,536 85,647 $ 7,552
Equity Accounted Investments [Member] | Other current assets [Member]      
Schedule of Equity Method Investments [Line Items]      
Current assets 18,760 196,994  
Equity Accounted Investments [Member] | Other non-current assets [Member]      
Schedule of Equity Method Investments [Line Items]      
Non current assets 20,558 25,304  
Equity Accounted Investments [Member] | Other current liabilities [Member]      
Schedule of Equity Method Investments [Line Items]      
Current liabilities 10,442 20,790  
Equity Accounted Investments [Member] | Other non-current liabilities [Member]      
Schedule of Equity Method Investments [Line Items]      
Non-current liabilities 25,540 30,407  
Equity Accounted Investments [Member] | Vessels and equipment [Member]      
Schedule of Equity Method Investments [Line Items]      
Non current assets 815,961 855,217  
Equity Accounted Investments [Member] | Cash and cash equivalents [Member]      
Schedule of Equity Method Investments [Line Items]      
Current assets 38,987 49,473  
Short-term Debt [Member]      
Schedule of Equity Method Investments [Line Items]      
Current liabilities 43,677 149,301  
Long-term Debt [Member]      
Schedule of Equity Method Investments [Line Items]      
Non-current liabilities $ 367,201 $ 485,627