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Financing Arrangements - Term Loan B Facility (Details)
1 Months Ended 12 Months Ended
Jan. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Debt Instrument [Line Items]      
Current portion of long-term debt   $ 14,599,000 $ 7,317,000
Debt issuance costs, net   8,527,000  
Long-term Debt, Gross   $ 754,362,000  
Secured Debt | Term Loan Facility      
Debt Instrument [Line Items]      
Debt issuance costs, gross $ 9,600,000    
Long term debt, maximum additional loan commitments, amount 225,000,000    
Line of credit facility covenant terms, first lien net leverage ratio for unlimited commitment   2.25  
Long-term debt outstanding   $ 441,600,000 446,400,000
Current portion of long-term debt   4,800,000  
Debt issuance costs, net   13,450,000  
Interest expense, debt   25,622,000 $ 31,707,000
Debt instrument, periodic payment, principal 1,200,000    
Long-term Debt, Gross $ 480,000,000    
Secured Debt | Term Loan Facility, Short-Term Portion      
Debt Instrument [Line Items]      
Debt issuance costs, net   2,861,000  
Secured Debt | Term Loan Facility, Long-Term Portion      
Debt Instrument [Line Items]      
Debt issuance costs, net   $ 10,589,000  
Secured Debt | Term Loan B Facility      
Debt Instrument [Line Items]      
Asset-based credit facility, interest rate   6.65%  
Secured Debt | Term Loan B Facility | London Interbank Offered Rate (LIBOR) | Maximum      
Debt Instrument [Line Items]      
Basis spread on variable rate on debt   4.50%  
Secured Debt | Term Loan B Facility | London Interbank Offered Rate (LIBOR) | Minimum      
Debt Instrument [Line Items]      
Basis spread on variable rate on debt   3.50%