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Restructuring and Asset Impairment - Severance and Retention Costs by Classification on the Consolidated Statements of Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 01, 2017
Jun. 25, 2016
Jul. 01, 2017
Jun. 25, 2016
Restructuring Cost and Reserve [Line Items]        
Total severance and transition costs $ 1,193 $ 4,099 $ 2,210 $ 4,120
Cost of services provided and products sold (excluding amortization of intangible assets)        
Restructuring Cost and Reserve [Line Items]        
Total severance and transition costs 554 367 1,477 388
Selling, general and administrative        
Restructuring Cost and Reserve [Line Items]        
Total severance and transition costs $ 639 $ 3,732 $ 733 $ 3,732