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Debt - Senior Secured Revolving Credit Facility - Narrative (Details)
6 Months Ended
Jun. 28, 2019
Feb. 22, 2019
USD ($)
Jun. 30, 2019
USD ($)
Jun. 30, 2018
USD ($)
Line of Credit Facility [Line Items]        
Financing costs write-offs     $ 3,755,000 $ 0
Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity under credit facility   $ 265,000,000    
Proportion of value of inventory and real property (as a percent) 65.00% 65.00%    
Proportion of commitment reduction along with prepayment with net cash proceeds of asset sales (as a percent)   50.00%    
Debt issuance costs   $ 4,900,000    
Unamortized debt issuance fees   1,900,000    
Financing costs write-offs   3,300,000    
Carrying value of debt     6,400,000  
Average daily balance of borrowings outstanding     16,100,000  
Credit Facility | Letter of Credit | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity under credit facility   25,000,000    
Carrying value of debt     $ 0  
Credit Facility | Swing Line Loan | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity under credit facility   $ 10,000,000    
Minimum | Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Fixed charge coverage ratio   1.05    
Minimum | Credit Facility | Letter of Credit | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Liquidity determinant, unrestricted cash on hand   $ 25,000,000    
Base Rate | Minimum | Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (as a percent)   1.25%    
Base Rate | Maximum | Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (as a percent)   1.75%    
Eurodollar | Minimum | Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (as a percent)   2.25%    
Eurodollar | Maximum | Credit Facility | Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (as a percent)   2.75%