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Stock-Based Compensation - Additional Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 30, 2017
USD ($)
$ / shares
shares
Dec. 31, 2016
USD ($)
shares
Jan. 02, 2016
USD ($)
$ / shares
shares
Mar. 11, 2015
$ / shares
shares
Reorganization        
Exchange of LP units to Common A Stock | $ $ 41,126 $ 953,752    
General and administrative expenses        
Reorganization        
Modification charge recognized in general and administrative costs | $     $ 14,500  
2015 Omnibus Equity Incentive Plan        
Reorganization        
Number of shares authorized     13,500,000  
Shares available for grant 8,600,000      
2015 Omnibus Equity Incentive Plan | Leverage restoration options, time-vesting        
Reorganization        
Stock units vesting period     4 years  
2015 Omnibus Equity Incentive Plan | Leverage restoration options, performance-vesting        
Reorganization        
Performance objective threshold waived (as a percent)     3.0  
2015 Omnibus Equity Incentive Plan | Common Class A        
Reorganization        
Options, Granted (in dollars per share) | $ / shares     $ 18.00  
Stock units vesting period     4 years  
Awards granted     240,000  
Stock option exercise price (in dollars per share) | $ / shares     $ 18.00  
2015 Omnibus Equity Incentive Plan | Common Class A | Warrants issued to holders of Class C interests        
Reorganization        
Number of warrants (in shares)       160,333
Exercise price per share under the Omnibus Incentive Plan (in dollars per share) | $ / shares       $ 18.00
2015 Omnibus Equity Incentive Plan | Common Class A | Leverage restoration options issued to holders of Class D interests        
Reorganization        
Number of warrants (in shares)       4,400,000
Exercise price per share under the Omnibus Incentive Plan (in dollars per share) | $ / shares       $ 18.00
2015 Omnibus Equity Incentive Plan | General and administrative expenses | Leverage restoration options, performance-vesting        
Reorganization        
Performance target expense | $     $ 37,700  
Stock options        
Reorganization        
Options, Granted (in dollars per share) | $ / shares $ 12.13      
Awards granted 377,630      
Stock option exercise price (in dollars per share) | $ / shares $ 12.13      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]        
Dividend yield (as a percent) 0.00% 0.00% 0.00%  
Volatility (as a percent) 47.00% 48.00% 50.00%  
Expected term 7 years 10 years    
Restricted stock        
Reorganization        
Weighted-average grant-date fair value | $ / shares $ 24.01      
Granted (in shares) 307,905      
Awards outstanding 508,586 352,602    
Number of units, Vested (in shares) 145,812      
Restricted stock | 2015 Omnibus Equity Incentive Plan        
Reorganization        
Stock units vesting period 1 year      
Granted (in shares) 34,928 28,140    
LP Units and options | 2015 Omnibus Equity Incentive Plan        
Reorganization        
Unamortized deferred compensation | $ $ 2,300      
Summit Holdings LP        
Reorganization        
Number of LP Units outstanding       69,000,000
Summit Holdings LP | Leverage restoration options, time-vesting        
Reorganization        
Number of LP Units outstanding       575,256
Summit Holdings LP | Leverage restoration options, performance-vesting        
Reorganization        
Number of LP Units outstanding 40,000     2,400,000