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Long-Term Debt - Credit Facility (Details) - Line of Credit - Revolving Credit Facility - USD ($)
6 Months Ended
Jun. 30, 2019
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Oct. 31, 2019
May 25, 2018
LIBOR            
Line of Credit Facility [Line Items]            
Original facility size         $ 150,000,000.0  
2019 ABL Facility            
Line of Credit Facility [Line Items]            
Original facility size   $ 450,000,000 $ 175,000,000      
Outstanding balance   0        
Letters of credit issued   28,874,000        
Available commitment   93,409,000        
2019 ABL Facility | LIBOR | Minimum            
Line of Credit Facility [Line Items]            
Interest rate floor 1.00%          
2018 Term Loan Facility            
Line of Credit Facility [Line Items]            
Original facility size   350,000,000       $ 350,000,000.0
Outstanding balance   343,000,000   $ 344,750,000    
Letters of credit issued   $ 0