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DEBT AND FINANCING COSTS - Narrative (Details)
1 Months Ended 12 Months Ended
Nov. 30, 2018
contract
Dec. 31, 2019
USD ($)
Feb. 28, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]        
Long-term debt   $ 396,000,000   $ 0
Letters of credit outstanding   0   0
Debt outstanding, including lease obligation,   405,800,000    
Finance lease obligation   $ 9,767,000   $ 0
Line of Credit        
Debt Instrument [Line Items]        
Debt covenant, leverage ratio   5.00    
Debt covenant distributions limit   $ 30,000,000    
Debt covenant term, adjustment of consolidated net income limit for three consecutive calendar months on annualized basis   350,000,000.0    
Revolving Credit Facility | Line of Credit        
Debt Instrument [Line Items]        
Number of extension options | contract 2      
Extended financing agreement term 1 year      
Debt maximum borrowing capacity   $ 1,500,000,000 $ 800,000,000.0  
Debt facility fee percentage   0.225%    
Revolving Credit Facility | Line of Credit | Base Rate        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   0.15%    
Revolving Credit Facility | Line of Credit | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   1.15%    
Letter of Credit | Line of Credit        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity     100,000,000.0  
Swingline Loan Subfacility | Line of Credit        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity     $ 100,000,000.0  
Minimum | Line of Credit        
Debt Instrument [Line Items]        
Debt covenant, leverage ratio   4.00    
Maximum | Line of Credit        
Debt Instrument [Line Items]        
Debt covenant, leverage ratio   5.50