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LONG-TERM DEBT (Components of Long-Term Debt) (Details) - USD ($)
Jun. 30, 2021
Jun. 22, 2021
Apr. 30, 2021
Debt Instrument [Line Items]      
Debt issuance costs and discounts $ (16,281,000)   $ (9,961,000)
Total long-term debt 1,983,719,000   1,490,039,000
Less: Current portion 0   0
Long-term debt 1,983,719,000   1,490,039,000
Estimated fair value of long-term debt $ 2,123,000,000   1,609,000,000
Senior Notes | Senior Notes, 5.500%, due November 2022      
Debt Instrument [Line Items]      
Interest rate 5.50%    
Senior notes $ 500,000,000.0   500,000,000
Senior Notes | Senior Notes, 5.250%, due October 2025      
Debt Instrument [Line Items]      
Interest rate 5.25%    
Senior notes $ 350,000,000   350,000,000
Senior Notes | Senior Notes, 2.500%, due July 2028      
Debt Instrument [Line Items]      
Interest rate 2.50% 2.50%  
Senior notes $ 500,000,000   0
Senior Notes | Senior Notes, 3.875%, due August 2030      
Debt Instrument [Line Items]      
Interest rate 3.875%    
Senior notes $ 650,000,000   $ 650,000,000