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Shareholders' Equity (Share Repurchase) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 29, 2017
Feb. 06, 2017
Dec. 28, 2016
Equity, Class of Treasury Stock [Line Items]      
Purchase of treasury stock $ 12,292    
Number of accumulated shares repurchased (in shares) 37,295   35,757
Share Repurchase Program 2016 [Member]      
Equity, Class of Treasury Stock [Line Items]      
Share repurchase, authorized amount (in dollars) $ 100,000    
Purchase of treasury stock (in shares) 1,000    
Purchase of treasury stock $ 12,300    
Remaining shares to be repurchased (in dollars) $ 66,900    
Number of accumulated shares repurchased (in shares) 2,700    
Value of shares repurchased $ 33,100    
November 2016 Accelerated Share Repurchase [Member]      
Equity, Class of Treasury Stock [Line Items]      
Share repurchase, authorized amount (in dollars)     $ 25,000
Purchase of treasury stock (in shares) 500 2,000 1,500
Purchase of treasury stock $ 6,900   $ 18,100
Remaining shares to be repurchased (in dollars)     $ 6,900
Volume-weighted average price of treasury stock repurchased   $ 12.36