v3.20.4
ORGANIZATION AND OPERATIONS Narrative 3 - Senior Notes (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 14, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Aug. 31, 2020
Debt Instrument [Line Items]          
Proceeds from note offerings, net of issuance costs $ 1,182,000 $ 1,182,035 $ 491,580 $ 0  
5.75% senior notes          
Debt Instrument [Line Items]          
Long-term debt $ 600,000 600,000 0    
Long-term debt, rate 5.75%        
6.375% senior notes          
Debt Instrument [Line Items]          
Long-term debt $ 600,000 600,000 0    
Long-term debt, rate 6.375%        
4.80% senior notes          
Debt Instrument [Line Items]          
Long-term debt   $ 0 $ 450,000   $ 450,000
Long-term debt, rate         4.80%
Logistics Notes due 2025 and Logistics Notes due 2030          
Debt Instrument [Line Items]          
Long-term debt, issuance costs $ 18,000