Annual report pursuant to Section 13 and 15(d)

Debt - Repayment (Details)

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Debt - Repayment (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
May 02, 2017
Dec. 26, 2019
Dec. 27, 2018
Dec. 28, 2017
Feb. 28, 2019
Sep. 14, 2018
May 29, 2018
Nov. 20, 2017
Jul. 25, 2017
Debt Instrument [Line Items]                  
Number of shares issued 10,147,025                
Common stock, par value $ 0.001                
Share price $ 21.00 $ 50.30     $ 37.50 $ 37.25 $ 45.80 $ 36.00 $ 40.00
Net proceeds $ 192,000                
Payments on term loans 192,000 $ 3,500 $ 3,500 $ 197,500          
Loss on extinguishment of debt       $ 5,442          
Term Loan Facility                  
Debt Instrument [Line Items]                  
Payments on term loans 192,000                
Loss on extinguishment of debt $ 5,400                
Class A Common Stock                  
Debt Instrument [Line Items]                  
Common stock, par value   $ 0.001 $ 0.001