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LONG-TERM DEBT (Details) - USD ($)
3 Months Ended
Oct. 19, 2017
Mar. 31, 2020
Mar. 31, 2019
Mar. 25, 2020
Dec. 31, 2019
Debt Instrument [Line Items]          
Interest expense, debt   $ 1,200,000 $ 700,000    
Amortization of debt issuance costs   300,000 200,000    
Commitment fee   600,000 $ 500,000    
Capitalized debt issuance costs   2,000,000      
Borrowings [Member]          
Debt Instrument [Line Items]          
Interest expense, debt   300,000      
Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Line of credit facility, amount outstanding   $ 745,000,000   $ 745,000,000 $ 0
Debt, Weighted Average Interest Rate   2.20%      
Revolving Credit Facility [Member] | 2017 Credit Agreement [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 750,000,000        
Term of loan 5 years        
Covenant compliance, secured leverage ratio 3.50        
Covenant compliance, total leverage ratio 4.50        
Letter of Credit [Member]          
Debt Instrument [Line Items]          
Remaining borrowing capacity   $ 20,000,000      
Long-term debt   200,000      
Line of credit facility, amount outstanding         $ 200,000
Letter of Credit [Member] | 2017 Credit Agreement [Member]          
Debt Instrument [Line Items]          
Remaining borrowing capacity   $ 4,800,000      
Interest rate, increase (decrease) 2.00%        
Letter of Credit [Member] | 2017 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on federal funds rate (in percent) 1.00%        
Letter of Credit [Member] | 2017 Credit Agreement [Member] | Federal Funds Rate [Member]          
Debt Instrument [Line Items]          
Basis spread on federal funds rate (in percent) 0.50%        
Initial Basis Spread [Member] | Letter of Credit [Member] | 2017 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on federal funds rate (in percent) 1.25%        
Initial Basis Spread One Month LIBOR [Member] | Letter of Credit [Member] | 2017 Credit Agreement [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument [Line Items]          
Basis spread on federal funds rate (in percent) 0.25%