Employee Retirement and Profit Sharing Plans - Schedule of Information Regarding Participation in Multiemployer Pension Plans (Detail)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Western Conference of Teamsters Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	916145047
Pension Plan Number	001
PPA Zone Status	Green	Green
FIP / RP Status Pending/ Implemented	NA
Extended Amortization Provisions	No
Expiration Date of Associated Collective Bargaining Agreement(s), First	Mar. 31, 2016
Expiration Date of Associated Collective Bargaining Agreement(s), Last	Sep. 30, 2019
Central States Southeast And Southwest Areas Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	366044243
Pension Plan Number	001
PPA Zone Status	Red	Red
FIP / RP Status Pending/ Implemented	Implemented
Extended Amortization Provisions	No
Expiration Date of Associated Collective Bargaining Agreement(s), First	Apr. 03, 2016
Expiration Date of Associated Collective Bargaining Agreement(s), Last	Sep. 15, 2018
Retail Wholesale Department Store International Union And Industry Pension Fund
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	630708442
Pension Plan Number	001
PPA Zone Status	Green	Green
FIP / RP Status Pending/ Implemented	NA
Extended Amortization Provisions	Yes
Expiration Date of Associated Collective Bargaining Agreement(s), First	Jul. 31, 2016
Expiration Date of Associated Collective Bargaining Agreement(s), Last	Jun. 07, 2018
Dairy Industry Union Pension Plan For Philadelphia Vicinity
Defined Benefit Plan Disclosure [Line Items]
Employer Identification Number	236283288
Pension Plan Number	001
PPA Zone Status	Green	Green
Extended Amortization Provisions	Yes
Expiration Date of Associated Collective Bargaining Agreement(s), First	Jun. 30, 2017
Expiration Date of Associated Collective Bargaining Agreement(s), Last	Sep. 30, 2018