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Acquisitions - Mid Pac Acquisitions (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Apr. 01, 2015
Sep. 30, 2015
Sep. 30, 2016
Mar. 31, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Business Acquisition [Line Items]                
Term loan     $ 380,786     $ 380,786   $ 165,212
Income tax benefit     30   $ 469 (8,117) $ (18,073)  
Revenues     510,305   495,503 1,301,909 1,622,873  
Net income (loss)     $ (27,761)   $ 14,740 (59,522) $ 26,925  
Mid Pac Petroleum, LLC                
Business Acquisition [Line Items]                
Cash consideration transferred prior to certain post-closing adjustments $ 74,400              
Additional consideration transfered   $ 1,000            
Goodwill, Period Increase (Decrease)       $ 600        
Income tax benefit       $ 600        
Revenues           131,900    
Net income (loss)           $ 8,500    
Mid Pac Petroleum, LLC | Mid Pac Petroleum, LLC                
Business Acquisition [Line Items]                
Term loan 45,300              
Mid Pac Credit Agreement | Mid Pac Petroleum, LLC                
Business Acquisition [Line Items]                
Term loan $ 55,000              
Par Hawaii Inc. | Mid Pac Petroleum, LLC                
Business Acquisition [Line Items]                
Outstanding membership interests of Mid Pac Petroleum, LLC 100.00%