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Debt - Narrative (Details)
3 Months Ended 6 Months Ended
Jun. 26, 2019
USD ($)
covenant
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]                  
Loss on debt extinguishment   $ 18,800,000 $ 0 $ 18,800,000 $ 0        
Debt issuance costs   $ 2,800,000   $ 2,800,000          
Line of Credit                  
Debt Instrument [Line Items]                  
Credit agreement, maximum borrowing capacity increase limit (up to) $ 115,000,000.0                
Credit agreement, maximum borrowing capacity increase limit, first lien pari passu basis leverage ratio 3.25                
Interest rate   5.15%   5.15%          
Mandatory prepayments, percentage of annual excess cash flow 50.00%                
Mandatory prepayments, percentage of non-ordinary course asset sales or other dispositions 100.00%                
Mandatory prepayments, percentage of net cash proceeds of debt incurrence 100.00%                
Number of financial covenants | covenant 2                
Maximum net leverage ratio 4.75                
Minimum interest coverage ratio 2.50                
Line of Credit | Forecast                  
Debt Instrument [Line Items]                  
Maximum net leverage ratio           3.50 4.25 4.50  
Minimum interest coverage ratio           3.25 3.00 2.75  
Line of Credit | Through June 30, 2021                  
Debt Instrument [Line Items]                  
Quarterly principal installments $ 4,100,000                
Line of Credit | June 30, 2021 - June 30, 2023                  
Debt Instrument [Line Items]                  
Quarterly principal installments 6,100,000                
Line of Credit | June 30, 2023 - March 31, 2024                  
Debt Instrument [Line Items]                  
Quarterly principal installments $ 8,100,000                
Line of Credit | Minimum                  
Debt Instrument [Line Items]                  
Commitment fee 0.30%                
Line of Credit | Maximum                  
Debt Instrument [Line Items]                  
Commitment fee 0.50%                
Line of Credit | Federal Funds Rate                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 0.50%                
Line of Credit | Eurodollar Rate                  
Debt Instrument [Line Items]                  
Variable rate basis, minimum 0.00%                
Line of Credit | Eurodollar Rate | Interest Rate Option - Basis Spread One                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 1.00%                
Line of Credit | Eurodollar Rate | Interest Rate Option - Basis Spread One | Minimum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 0.75%                
Line of Credit | Eurodollar Rate | Interest Rate Option - Basis Spread One | Maximum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 1.75%                
Line of Credit | Eurodollar Rate | Interest Rate Option Two                  
Debt Instrument [Line Items]                  
Variable rate basis, minimum 0.00%                
Line of Credit | Eurodollar Rate | Interest Rate Option Two | Minimum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 1.75%                
Line of Credit | Eurodollar Rate | Interest Rate Option Two | Maximum                  
Debt Instrument [Line Items]                  
Basis spread on variable rate basis 2.75%                
Line of Credit | Senior Term Loan                  
Debt Instrument [Line Items]                  
Credit agreement, maximum borrowing capacity $ 325,000,000.0                
Credit agreement, issuance percentage of par 99.66%                
Debt term 5 years                
Long-term debt   $ 325,000,000.0   $ 325,000,000.0         $ 268,700,000
Line of Credit | Senior Revolver                  
Debt Instrument [Line Items]                  
Principle of debt issued $ 100,000,000.0                
Debt term 5 years                
Long-term debt   60,000,000.0   60,000,000.0         $ 0
Line of Credit | Line of Credit                  
Debt Instrument [Line Items]                  
Long-term debt   60,000,000.0   60,000,000.0          
Line of Credit | Letter of Credit                  
Debt Instrument [Line Items]                  
Long-term debt   $ 0   $ 0