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Long-Term Debt - Narrative (Details) - USD ($)
1 Months Ended 9 Months Ended
Sep. 25, 2019
Oct. 31, 2018
Sep. 30, 2020
Revolving Credit Facility      
Line of Credit Facility      
Expansion threshold $ 225,000,000.0    
Expansion threshold (percent) 100.00%    
Capacity available for specific purpose     $ 100,000,000.0
Credit facility borrowing capacity     388,600,000
Letter of credit outstanding     11,400,000
Maximum aggregate net proceeds trigger     $ 5,000,000.0
Revolving Credit Facility | LIBOR      
Line of Credit Facility      
Basis spread on variable rate (percent)     1.50%
Revolving Credit Facility | Base Rate      
Line of Credit Facility      
Basis spread on variable rate (percent)     0.50%
Line of Credit | Revolving Credit Facility      
Line of Credit Facility      
Debt term 5 years    
Borrowing capacity $ 400,000,000.0    
Commitment fee on unused amount     0.175%
Term Loan      
Line of Credit Facility      
Periodic payment, years one to three, percentage of original principal amount (percent)     2.50%
Loan facility for one year (percent)     5.00%
Loan facility for two years (percent)     1.25%
Term Loan | Revolving Credit Facility      
Line of Credit Facility      
Borrowing capacity $ 150,000,000.0    
Long-term line of credit     $ 147,100,000
Senior Notes      
Line of Credit Facility      
Senior notes   $ 350,000,000.0  
Stated interest rate (percent)   5.75%  
Redemption price as a percentage of principal   100.00%