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Joint Venture Transactions
12 Months Ended
Dec. 28, 2017
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures [Abstract]  
Related Party Transactions Disclosure
11. Joint Venture Transactions
 
At December 28, 2017 and December 29, 2016, the Company held investments with aggregate carrying values of $4,239,000 and $6,096,000, respectively, in several joint ventures, one of which is accounted for under the equity method, and two of which are accounted for under the cost method.