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Acquisitions - Summary of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Jul. 14, 2016
Dec. 31, 2015
Apr. 01, 2015
Dec. 31, 2014
Goodwill $ 105,732   $ 41,327   $ 20,786
Wyoming Refining Company          
Cash   $ 183      
Accounts receivable   16,880      
Inventories   27,904      
Prepaid and other assets   1,304      
Property, plant and equipment   254,367      
Goodwill   64,994      
Accounts payable and other current liabilities   (57,861)      
Other non-current liabilities   (30,269)      
Total   209,366      
Wyoming Refining Company | Secured Debt          
Wyoming Refining Senior Secured Debt   (58,036)      
Wyoming Refining Company | Revolving Credit Facility          
Wyoming Refining Senior Secured Debt   $ (10,100)      
Mid Pac Petroleum, LLC          
Cash       $ 10,007  
Accounts receivable       9,905  
Inventories       5,375  
Prepaid and other current assets       1,444  
Property, plant and equipment       40,997  
Land       34,800  
Goodwill       26,942  
Intangible assets       33,647  
Other non-current assets       1,228  
Accounts payable and other current liabilities       (10,742)  
Deferred tax liability     $ (16,800) (16,759)  
Other non-current liabilities       (7,235)  
Total       $ 129,609