XML 33 R64.htm IDEA: XBRL DOCUMENT v3.19.3
Equity-Based Compensation - Additional Information (Details) - $ / shares
12 Months Ended
Jun. 25, 2018
Sep. 30, 2019
May 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options granted to directors and certain employees (shares)   2,432,916  
Options granted, exercise price (in USD per share)   $ 22.50  
2018 Equity Incentive Award Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available for grant under the plan (shares)   4,552,873 3,500,000
Additional Class A common shares added at the beginning of calendar year as percentage of common stock outstanding at end of previous year (percent)   4.00%  
Directors and Certain Employees | IPO | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options granted to directors and certain employees (shares) 2,045,000    
Options granted, exercise price (in USD per share) $ 13.00    
Award vesting period 3 years