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Income Taxes, New Tax Legislation and ASU 2016-09 (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 26, 2017
Dec. 31, 2018
Dec. 26, 2017
Dec. 27, 2016
Dec. 29, 2015
ASU 2016-09          
Effective tax rate (as a percent)     26.10% 29.80% 29.80%
Income tax (expense) benefit     $ (48,581) $ (51,183) $ (42,986)
Federal corporate tax rate (as a percent)     35.00% 35.00% 35.00%
Income tax (expense) benefit, new tax legislation $ 3,100   $ 3,100    
Earnings per share basic and diluted, related to new tax legislation (in dollars per share) $ 0.04   $ 0.04    
Income tax (expense) benefit, new tax legislation revaluing deferred tax balances     $ 3,800    
Income tax expense, new tax legislation foreign operations     700    
Forecast          
ASU 2016-09          
Federal corporate tax rate (as a percent)   21.00%      
ASU 2016-09 Compensation-Stock Compensation          
ASU 2016-09          
Income tax (expense) benefit     $ 3,400    
Earnings per share, basic and diluted (in dollars per share)     $ 0.05