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Business Combinations Business Combinations (Tables)
 9 Months Ended
Sep. 26, 2020
Business Acquisition [Line Items]  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
The following table summarizes the preliminary purchase price allocation of the estimated fair values of the assets acquired and liabilities assumed:
September 26,
2020		December 31,
2019
Detail of acquisitions:
Assets acquired:  
Cash$— $3 
Receivables— 2,332 
Operating supplies23 84 
Prepaid expense— 27 
Equipment623 1,837 
Deposits and other— 96 
Intangibles2,018 4,067 
Goodwill2,576 4,174 
Liabilities assumed(380)(1,479)
Debt issued for purchases of businesses(1,034)(2,612)
Cash paid$3,826 $8,529