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Multiemployer Pension Plans (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Contributions $ 6,715 $ 6,282 $ 6,162
Defined contribution plans contributions charged to expense $ 9,500 $ 9,000 7,800
Central States, Southeast and Southwest Areas Pension Fund      
Defined Benefit Plan Disclosure [Line Items]      
EIN/Pension Plan Number [1] 36-6044243/001    
Pension Protection Act Zone Status Red Red  
FIP / RP Status Pending / Implemented Implemented    
Contributions $ 1,996 $ 1,806 1,752
Surcharge Imposed No    
Expiration Dates of Collective Bargaining Agreements, First Apr. 30, 2016    
Expiration Dates of Collective Bargaining Agreements, Last Aug. 31, 2017    
United Food and Commercial Workers Local One Pension Fund      
Defined Benefit Plan Disclosure [Line Items]      
EIN/Pension Plan Number [2] 16-6144007/001    
Pension Protection Act Zone Status Red Red  
FIP / RP Status Pending / Implemented Implemented    
Contributions $ 169 $ 136 123
Surcharge Imposed No    
Expiration Dates of Collective Bargaining Agreements, First Dec. 31, 2017    
Pension Fund All Other      
Defined Benefit Plan Disclosure [Line Items]      
Contributions $ 4,550 $ 4,340 $ 4,287
Maximum [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Multi Employer Plans Status Funded Percentage 65.00%    
[1] The applicable collective bargaining agreements related to this pension fund expire between April 30, 2016 and August 31, 2017.
[2] The collective bargaining agreement related to this pension fund expires on December 31, 2017.