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Employee Benefit Plans - Total Contributions Made to Multiemployer Pension Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 26, 2015
Sep. 27, 2014
Sep. 28, 2013
Multiemployer Plans [Line Items]      
Contributions $ 1,073 $ 1,168 $ 1,162
New England Teamsters & Trucking Industry Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Pension Fund New England Teamsters & Trucking Industry Pension Fund (a)    
EIN/Pension Plan Number 046372430    
PPA Zone Status [1] Red Red  
FIP/RP Status Implemented    
Contributions $ 584 $ 616 562
Contributions greater than 5% of Total Plan Contributions [1] false    
Expiration date of CBA, First date Apr. 30, 2016    
Expiration date of CBA, Last date Mar. 31, 2017    
Local 282 Pension Trust [Member]      
Multiemployer Plans [Line Items]      
Pension Fund Local 282 Pension Trust (b)    
EIN/Pension Plan Number 116245313    
PPA Zone Status [2] Green Green  
Contributions $ 269 $ 336 284
Contributions greater than 5% of Total Plan Contributions [2] false    
Expiration date of CBA Aug. 31, 2019    
Teamsters Industrial Employees Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Pension Fund Teamsters Industrial Employees Pension Fund (c)    
EIN/Pension Plan Number 226099363    
PPA Zone Status [3] Green Green  
Contributions $ 200 $ 185 179
Contributions greater than 5% of Total Plan Contributions [3] true    
Expiration date of CBA Jun. 30, 2017    
Other [Member]      
Multiemployer Plans [Line Items]      
Pension Fund [4] Other    
Contributions [4] $ 20 $ 31 $ 137
Contributions greater than 5% of Total Plan Contributions [4] false    
[1] Based on most recent available valuation information for plan year ended September 2014.
[2] Based on most recent available valuation information for plan year ended February 2014.
[3] Based on most recent available valuation information for plan year ended December 2014.
[4] Includes the MEPPs from which the Partnership withdrew in fiscal 2013.