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CREDIT AGREEMENT - Additional Information (Detail)
Apr. 28, 2017
USD ($)
May 24, 2017
USD ($)
Apr. 30, 2017
USD ($)
Apr. 27, 2017
USD ($)
Debt Instrument [Line Items]        
Revolving credit facility, maximum borrowing capacity $ 900,000,000     $ 750,000,000
Line of credit        
Debt Instrument [Line Items]        
Increase in debt to total capitalization ratio (as percent) 5.00%      
Line of credit | 2017        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation $ 100,000,000      
Revolving credit facility, permitted carry over of capital expenditure limitation     $ 15,000,000  
Line of credit | 2018        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation 105,000,000      
Line of credit | 2019        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation 110,000,000      
Line of credit | 2020        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation 115,000,000      
Line of credit | 2021        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation 120,000,000      
Line of credit | 2022        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation $ 125,000,000      
Line of credit | Revolving Credit Facility        
Debt Instrument [Line Items]        
Revolving credit facility, maximum debt to total capitalization ratio (as percent) 0.50      
Revolving credit facility, minimum net worth requirement     887,200,000  
Revolving credit facility, outstanding borrowings     0  
Revolving credit facility, remaining available balance     880,300,000  
Line of credit | Revolving Credit Facility | Subsequent Event        
Debt Instrument [Line Items]        
Revolving credit facility, outstanding borrowings   $ 0    
Revolving credit facility, remaining available balance   880,300,000    
Line of credit | Letter of Credit        
Debt Instrument [Line Items]        
Revolving credit facility, outstanding borrowings     $ 19,700,000  
Line of credit | Letter of Credit | Subsequent Event        
Debt Instrument [Line Items]        
Revolving credit facility, outstanding borrowings   $ 19,700,000    
Construction expenditure limitation | Revolving Credit Facility | Tyler, Texas        
Debt Instrument [Line Items]        
Revolving credit facility, construction expenditure limitation $ 200,500,000      
Construction expenditure limitation | Revolving Credit Facility | Floowood, Mississippi        
Debt Instrument [Line Items]        
Revolving credit facility, construction expenditure limitation 15,000,000      
Construction expenditure limitation | Revolving Credit Facility | Unknown City and State        
Debt Instrument [Line Items]        
Revolving credit facility, construction expenditure limitation 210,000,000      
Processing Complex | Revolving Credit Facility | Unknown City and State        
Debt Instrument [Line Items]        
Revolving credit facility, construction expenditure limitation 60,000,000      
Aircraft expenditure | Revolving Credit Facility        
Debt Instrument [Line Items]        
Revolving credit facility, capital expenditure limitation $ 70,000,000