v3.10.0.1
Summary of Significant Accounting Policies - Concentrations (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Concentration Risk [Line Items]        
Percentage of employees covered by collective bargaining agreements 47.10%   47.10%  
Customer concentration risk | Consolidated net revenues        
Concentration Risk [Line Items]        
Percentage of total net revenues for customer 20.50% 19.70% 19.30% 19.80%
Customer concentration risk | Consolidated net revenues | Sweet Baked Goods        
Concentration Risk [Line Items]        
Percentage of total net revenues for customer 20.00% 19.00% 18.70% 19.10%
Customer concentration risk | Consolidated net revenues | In-Store Bakery        
Concentration Risk [Line Items]        
Percentage of total net revenues for customer 0.50% 0.70% 0.60% 0.70%