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Stockholders' Equity (Details) - USD ($)
3 Months Ended 9 Months Ended
Aug. 07, 2017
Feb. 06, 2017
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Class of Stock [Line Items]            
Income tax expense/(benefit)     $ 6,296,000 $ (744,000) $ 15,856,000 $ 9,102,000
Shares (in shares)     167,181,000 165,436,000 166,628,000 165,154,000
Payments for Repurchase of Common Stock         $ 0 $ 5,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   956,809        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)   559,388        
Share-based Compensation Arrangement by Share-based Payment Award, Annual Vesting After Initial Cliff     33.33%   33.33%  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Performance Period Two         3 years  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Target Percentage     100.00%   100.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Holding Requirement         2 years  
Period in force 2 years          
Authorized amount $ 100,000,000.0          
Accounting Standards Update 2016-09 [Member]            
Class of Stock [Line Items]            
Income tax expense/(benefit)         $ 100,000  
Shares (in shares)         155,000