XML 67 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
DEBT AND FINANCING COSTS - Narrative (Details) - Line of Credit
1 Months Ended 12 Months Ended
Nov. 30, 2018
USD ($)
contract
Dec. 31, 2018
USD ($)
Mar. 01, 2019
USD ($)
Feb. 28, 2019
USD ($)
Revolving Credit Facility        
Debt Instrument [Line Items]        
Number of extension options | contract 2      
Extended financing agreement term 1 year      
Debt maximum borrowing capacity $ 450,000,000.0      
Debt covenant, minimum consolidated net income for three consecutive calendar months 175,000,000      
Debt covenant, minimum additional capital raised $ 250,000,000.0      
Debt outstanding   $ 0    
Debt facility fee percentage   0.20%    
Debt covenant, maximum debt-to-capital ratio   30.00%    
Debt covenant, maximum leverage ratio   5.00    
Debt covenant, maximum leverage ratio for up to one year following qualified acquisition   5.50    
Revolving Credit Facility | Base Rate        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   0.05%    
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)        
Debt Instrument [Line Items]        
Debt instrument, basis spread on variable rate   1.05%    
Subsequent Event | Revolving Credit Facility        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity       $ 800,000,000
Subsequent Event | Letter of Credit        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity       100,000,000
Subsequent Event | Swingline Loan Subfacility        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity       $ 100,000,000
Scenario, Forecast | Subsequent Event | Revolving Credit Facility        
Debt Instrument [Line Items]        
Debt maximum borrowing capacity     $ 1,500,000,000.0