Annual report pursuant to Section 13 and 15(d)

FAIR VALUE MEASUREMENTS (Fair Value of Debt) (Details)

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FAIR VALUE MEASUREMENTS (Fair Value of Debt) (Details) - Fair Value, Inputs, Level 2 [Member] - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
6.5% Senior Secured Notes Due 2027 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value $ 1,315,284 $ 1,340,688
3.75% Senior Secured Notes Due 2028 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 498,380 0
4.75% Senior Notes Due 2027 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 978,358 970,872
4.875% Senior Notes Due 2024 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 582,952 581,480
5.625% Senior Notes Due 2026 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 310,284 307,785
2.5% Convertible Senior Notes Due 2023 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Debt, Fair Value Disclosures 996,369 720,764
2.0% Convertible Senior Notes due 2025 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible Debt, Fair Value Disclosures $ 531,040 $ 425,172