Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Narrative (Details)

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Commitments and Contingencies - Narrative (Details) - USD ($)
 12 Months Ended
Jun. 27, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Guarantor Obligations [Line Items]        
Operating leases, rent expense   $ 22,100,000 $ 11,400,000 $ 8,200,000
Workers compensation, deductible   100,000 300,000  
Workers compensation insurance aggregate stop loss   5,400,000 3,500,000  
Accrued workers’ compensation and auto claims   4,700,000 2,900,000  
Self insurance, aggregate stop loss per claim basis   200,000    
Self insurance, aggregate stop loss per calendar year   5,800,000    
Self insurance, claims accrued   3,200,000 2,100,000  
Warranty accrual   0 0  
Product warranty expense   0 $ 0 $ 0
Bid Bond | Performance Guarantee        
Guarantor Obligations [Line Items]        
Guarantee   3,600,000    
Estimated costs to complete projects secured by performance and payment bonds   17,000,000    
Performance And Payment Bond | Performance Guarantee        
Guarantor Obligations [Line Items]        
Guarantee   $ 22,300,000    
Wendco Of Puerto Rico Inc, Multisystem Restaurant Inc, Restaurant Operators Inc, Apple Caribe, Inc.        
Guarantor Obligations [Line Items]        
Loss contingency, damages sought $ 300,000,000