Partners' Interest (Tables)
12 Months Ended
Dec. 27, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Changes in Each Component of Accumulated Other Comprehensive Loss
     Change in
retirement plans
     Foreign currency
translation
adjustments
     Accumulated
other
comprehensive
loss
 

Balance—December 31, 2011

   $ (6,577       $ (6,577

Postretirement liability adjustment

     (2,553         (2,553
  

 

 

    

 

 

    

 

 

 

Balance—December 29, 2012

  (9,130   —        (9,130

Postretirement liability adjustment

  3,085      3,085   
  

 

 

    

 

 

    

 

 

 

Balance—December 28, 2013

  (6,045   —        (6,045

Postretirement curtailment adjustment

  (942   —        (942

Postretirement liability adjustment

  (2,743   —        (2,743

Foreign currency translation adjustment

  —        (5,816   (5,816
  

 

 

    

 

 

    

 

 

 

Balance—December 27, 2014

$ (9,730 $ (5,816 $ (15,546