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Shareholders' Equity (Share Repurchase) (Details) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 30, 2015
Jun. 29, 2016
Equity, Class of Treasury Stock [Line Items]    
Purchase of treasury stock   $ 7,726
Number of accumulated shares repurchased (in shares) 29,659 30,421
Share Repurchase Program 2015 [Member]    
Equity, Class of Treasury Stock [Line Items]    
Share repurchase, authorized amount (in dollars)   $ 100,000
Purchase of treasury stock (in shares)   800
Purchase of treasury stock   $ 7,700
Value of remaining shares to be repurchased (in dollars)   $ 30,100
Number of accumulated shares repurchased (in shares)   5,400
Value of shares repurchased   $ 69,900
Share Repurchase Program 2016 [Member]    
Equity, Class of Treasury Stock [Line Items]    
Share repurchase, authorized amount (in dollars)   100,000
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) 3,500  
Purchase of treasury stock $ 36,900  
Value of remaining shares to be repurchased (in dollars)   $ 13,100