Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (Narrative) (Details)

v3.19.1
LONG-TERM DEBT (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Capitalized interest expense, undeveloped properties $ 800  
Debt issuance costs, net 29,628 $ 30,733
Construction loan    
Debt Instrument [Line Items]    
Debt issuance costs, net 100  
6.000% senior unsecured notes due 2024 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt $ 650,000 650,000
Stated interest rate, percent 6.00%  
Debt issuance costs, net $ 8,400  
6.625% senior unsecured notes due 2023 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt $ 350,000 350,000
Stated interest rate, percent 6.625%  
Debt issuance costs, net $ 4,200  
6.375% senior unsecured notes due 2025 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt $ 600,000 600,000
Stated interest rate, percent 6.375%  
Debt issuance costs, net $ 12,100  
6.375% senior unsecured notes due 2026 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt $ 450,000 450,000
Stated interest rate, percent 6.375%  
Debt issuance costs, net $ 4,900  
Nova Scotia, Amegy, KeyBank | Revolving credit agreement    
Debt Instrument [Line Items]    
Credit facility interest rate at the eurodollar rate 3.99%  
Nova Scotia, Amegy, KeyBank | Revolving credit agreement | Revolving credit agreement    
Debt Instrument [Line Items]    
Long-term debt $ 45,000 $ 45,000
Remaining borrowing capacity 683,900  
Nova Scotia, Amegy, KeyBank | Letter of credit | Revolving credit agreement    
Debt Instrument [Line Items]    
Credit facility outstanding $ 271,100