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Earnings (Loss) per Share - Additional Information (Details) - shares
3 Months Ended 9 Months Ended
Aug. 09, 2019
Sep. 29, 2019
Sep. 29, 2019
Sep. 30, 2018
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Dilutive shares included in computation of earnings (loss) per share   102,490 47,446 45,082
Restricted Share Awards | Restated 2015 Equity Incentive Plan        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Granted share awards 264,000      
Performance Share Awards | Restated 2015 Equity Incentive Plan        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Granted share awards 52,500      
Unvested Restricted Share Awards        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Dilutive shares included in computation of earnings (loss) per share   10,763 3,588  
Stock Option Awards        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Number of stock option awards outstanding   1,495,750 1,495,750 1,495,750
Management | Common Class B Units        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings (loss) per share   833,346 833,346  
Dilutive shares included in computation of earnings (loss) per share       4,959
Black Knight Advisory Services, LLC | Common Class B Units        
Antidilutive Securities Excluded From And Dilutive Securities Included In Computation Of Earnings Per Share [Line Items]        
Dilutive shares included in computation of earnings (loss) per share       173,484