Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Break-Down of Long-Term Debt) (Details)

v3.20.2
LONG-TERM DEBT (Break-Down of Long-Term Debt) (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Net unamortized debt issuance costs $ (19,772) $ (23,751)
Less: current maturities of long term debt (656) (631)
Debt reflected as long term 2,068,036 1,978,020
Construction Loan    
Debt Instrument [Line Items]    
Net unamortized debt issuance costs (100)  
6.625% senior unsecured notes due 2023 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 324,583 329,467
Net unamortized debt issuance costs $ (2,600)  
Stated interest rate, percent 6.625%  
6.000% senior unsecured notes due 2024 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt $ 579,568 603,428
Net unamortized debt issuance costs $ (5,700)  
Stated interest rate, percent 6.00%  
6.375% senior unsecured notes due 2025 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt $ 507,870 529,525
Net unamortized debt issuance costs $ (8,100)  
Stated interest rate, percent 6.375%  
6.375% senior unsecured notes due 2026 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt $ 374,617 397,529
Net unamortized debt issuance costs $ (3,300)  
Stated interest rate, percent 6.375%  
Nova Scotia, Amegy, KeyBank | Revolving Credit Agreement | Revolving Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt $ 279,857 120,000
InterBank | Letter of Credit | Construction Loan    
Debt Instrument [Line Items]    
Long-term debt $ 21,969 $ 22,453