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Stock Based Compensation And Incentive Performance Plans (CEO July 2012 Grant) (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jul. 03, 2012
USD ($)
tranche
target
$ / shares
shares
Dec. 31, 2016
USD ($)
condition
Dec. 31, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Total Fair Value | $   $ 0 $ 9,660
Unrecognized stock-based compensation expense | $   $ 10,883  
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Weighted Average Period to Recognize Expense   1 year 3 months  
CEO [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Total Shares (shares) | shares 800,000    
Number of share price targets | target 4    
Consecutive trading days 45 days    
Vesting period 5 years    
CEO Grant July 2012 Total Fair Value | $ $ 16,151    
CEO Grant July 2012 Weighted Average Period to Recognize Expense 4 years    
Number of market conditions | condition   4  
Number of tranches | tranche 4    
CEO [Member] | Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Total Shares (shares) | shares 200,000    
CEO Grant July 2012 Market Price Target (USD per share) $ 31.25    
CEO [Member] | Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Market Price Target (USD per share) 36.25    
CEO [Member] | Tranche Three [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Market Price Target (USD per share) 41.25    
CEO [Member] | Tranche Four [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
CEO Grant July 2012 Market Price Target (USD per share) $ 50