Quarterly report pursuant to Section 13 or 15(d)

Debt - Term Loan Facility (Narrative) (Details)

v3.20.2
Debt - Term Loan Facility (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
May 18, 2020
Feb. 14, 2020
Feb. 13, 2020
Jun. 25, 2020
Jun. 27, 2019
Jun. 25, 2020
Jun. 27, 2019
Dec. 26, 2019
Debt Instrument [Line Items]                
Total minimum debt payments   $ 144,600,000   $ 219,263,000   $ 219,263,000   $ 145,500,000
Proceeds from term loan facility           75,000,000 $ 0  
Fees to creditors           6,882,000 0  
Gain (loss) on extinguishment of debt       1,015,000 $ 0 1,015,000 $ 0  
Term Loan Facility Accordion Feature                
Debt Instrument [Line Items]                
Borrowing capacity   $ 270,000,000.0            
Borrowing capacity as a percentage of EBITDA   100.00%            
Amended Term Loan Facility                
Debt Instrument [Line Items]                
Total minimum debt payments       $ 144,263,000   $ 144,263,000   145,500,000
First Lien Leverage Ratio   2.50            
Consolidated Secured Leverage Ratio   3.50            
Consolidated Total Leverage Ratio   3.50            
Applicable interest rate       2.20%   2.20%    
Amended Term Loan Facility | Maximum                
Debt Instrument [Line Items]                
Consolidated Total Leverage Ratio   4.50            
Amended Term Loan Facility | Base rate                
Debt Instrument [Line Items]                
Basis spread on variable rate 3.00% 1.00%            
Leverage based step-up (as a percent)   1.25%            
Amended Term Loan Facility | Base rate | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate     1.75%          
Amended Term Loan Facility | Base rate | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate     1.50%          
Amended Term Loan Facility | Eurodollar rate                
Debt Instrument [Line Items]                
Basis spread on variable rate 4.00% 2.00%            
Leverage based step-up (as a percent)   2.25%            
Interest rate floor (as a percent) 1.00% 0.00%            
Amended Term Loan Facility | Eurodollar rate | Maximum                
Debt Instrument [Line Items]                
Basis spread on variable rate     2.75%          
Amended Term Loan Facility | Eurodollar rate | Minimum                
Debt Instrument [Line Items]                
Basis spread on variable rate     2.50%          
UBS Facility Term Loan B-1                
Debt Instrument [Line Items]                
Total minimum debt payments       $ 75,000,000   $ 75,000,000   $ 0
Applicable interest rate       5.00%   5.00%    
Fourth Amendment to Term Loan Facility                
Debt Instrument [Line Items]                
Face amount of debt $ 75,000,000.0              
Proceeds from term loan facility 70,500,000              
Original issue discount 4,100,000     $ 4,100,000   $ 4,100,000    
Fees to creditors $ 300,000              
Gain (loss) on extinguishment of debt       1,000,000.0        
Unamortized debt issuance costs       $ 500,000   $ 500,000