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Stockholders' Equity (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jul. 24, 2018
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Apr. 27, 2016
Stockholders' Equity [Line Items]            
Dividends, Per Share, Declared   $ 0.15 $ 0.15 $ 0.30 $ 0.30  
Stock Options            
Stockholders' Equity [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   0 0 0 0  
Restricted Stock Units (RSUs)            
Stockholders' Equity [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount   14 0 14 0  
2007 Share Repurchase Plan [Member]            
Stockholders' Equity [Line Items]            
Stock repurchased during period, shares         14,696  
Shares acquired weighted average cost per share         $ 20.39  
Stock repurchased during period, value         $ 299,919  
2016 Share Repurchase Plan [Member]            
Stockholders' Equity [Line Items]            
Stock Repurchase Program, Number of Shares Authorized to be Repurchased           40,000
Remaining number of shares authorized to be repurchased   20,360   20,360    
Subsequent Event [Member]            
Stockholders' Equity [Line Items]            
Dividends, Per Share, Declared $ 0.15