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Subsequent Events - Ninth Amendment to Revolving Credit Agreement (Details) - USD ($)
Apr. 27, 2020
Mar. 31, 2020
Subsequent event    
Subsequent Event [Line Items]    
Line of credit facility, commitment fee amount $ 150,000,000.0  
Leverage ratio 250.00%  
Subsequent event | Base Rate    
Subsequent Event [Line Items]    
Line of credit facility, maximum commitment fee percentage 75.00%  
Subsequent event | Minimum    
Subsequent Event [Line Items]    
Letters of credit outstanding, amount $ 30,000,000.0  
Subsequent event | Minimum | London Interbank Offered Rate (LIBOR)    
Subsequent Event [Line Items]    
Line of credit facility, commitment fee percentage 2.00%  
Subsequent event | Minimum | Base Rate    
Subsequent Event [Line Items]    
Line of credit facility, commitment fee percentage 1.00%  
Subsequent event | Maximum    
Subsequent Event [Line Items]    
Letters of credit outstanding, amount $ 60,000,000.0  
Subsequent event | Maximum | London Interbank Offered Rate (LIBOR)    
Subsequent Event [Line Items]    
Line of credit facility, commitment fee percentage 3.00%  
Subsequent event | Maximum | Base Rate    
Subsequent Event [Line Items]    
Line of credit facility, commitment fee percentage 2.00%  
Revolving Credit Agreement    
Subsequent Event [Line Items]    
Borrowing base   $ 1,000,000,000.0
Letters of credit outstanding, amount   $ 6,700,000
Revolving Credit Agreement | Subsequent event    
Subsequent Event [Line Items]    
Borrowing base $ 1,075,000,000.000  
Revolving Credit Agreement | Subsequent event | Base Rate    
Subsequent Event [Line Items]    
Borrowing base 2,700,000,000  
Revolving Credit Agreement | Subsequent event | Minimum    
Subsequent Event [Line Items]    
Borrowing base $ 1,000,000,000.0