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Accounting Policies and Basis of Presentation (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jan. 01, 2014
USD ($)
Jul. 04, 2015
USD ($)
item
MW
Jun. 28, 2014
USD ($)
Jul. 04, 2015
USD ($)
MW
Jun. 28, 2014
USD ($)
Dec. 31, 2014
USD ($)
Apr. 04, 2015
Dec. 31, 2006
USD ($)
Supplemental Non-Cash Transactions                
Number of affiliates | item   1            
Non-cash, pay-in-kind interest income and accretion of discount recognized on a note receivable from an affiliate   $ 4,405,000 $ 3,907,000 $ 8,765,000 $ 7,535,000      
Dominican Republic | Power                
Change in Accounting Method                
Amount invested under equity method   $ 10,000,000   $ 10,000,000        
Capacity of power facility (in megawatts) | MW   300   300        
Percentage of ownership interest accounted as equity method investment   29.90%   29.90%        
Amount investment under cost method   $ 5,910,000   $ 5,910,000       $ 5,910,000
Dominican Republic | Power | Change in accounting method                
Change in Accounting Method                
Increase in investment in affiliates $ 12,691,000              
Tax impact           $ 0    
Dominican Republic | Power | Maximum                
Change in Accounting Method                
Percentage of ownership interest accounted as cost method investment             20.00% 20.00%