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Shareholders' Equity (Share Repurchase) (Details) - USD ($)
$ in Thousands, shares in Millions
 3 Months Ended
Mar. 30, 2016
Dec. 30, 2015
Equity, Class of Treasury Stock [Line Items]    
Share repurchase, authorized amount (in dollars) $ 100,000  
Purchase of treasury stock (in shares) 0.4  
Purchase of treasury stock $ 3,903  
Number of accumulated shares repurchased (in shares) 5.1  
Value of shares repurchased $ 66,100  
Value of remaining shares to be repurchased (in dollars) $ 33,900  
November 2015 Accelerated Share Repurchase [Member]    
Equity, Class of Treasury Stock [Line Items]    
Share repurchase, authorized amount (in dollars)   $ 50,000
Purchase of treasury stock (in shares)   3.5
Purchase of treasury stock   $ 36,900
Value of remaining shares to be repurchased (in dollars)   $ 13,100