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Indebtedness (Narrative) (Details) - USD ($)
$ in Thousands
Oct. 23, 2017
Jun. 28, 2016
Dec. 30, 2017
Nov. 21, 2014
Revolving Credit Facility        
Line of Credit Facility        
Line of Credit Facility, Current Borrowing Capacity   $ 1,100,000    
Expansion option to increase credit facility   $ 200,000    
Senior Notes        
Line of Credit Facility        
Debt Instrument, Face Amount       $ 300,000
Debt Instrument, Interest Rate, Stated Percentage       5.25%
Securitization Program        
Line of Credit Facility        
Maximum credit facility amount that can borrow $ 130,000      
Percentage of borrowing capacity on the Securitization Program 80.00%      
Percentage of borrowing base on the Securitization Program 100.00%      
Minimum borrowing requirement for the Securitization Program     $ 104,000