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Summary of Quarterly Results (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 29, 2018
Sep. 29, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 30, 2017
Sep. 30, 2017
Jul. 01, 2017
Apr. 01, 2017
Dec. 31, 2018
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Dec. 26, 2015
Summary of Quarterly Results [Abstract]                          
Net sales $ 892,988 $ 869,076 $ 871,100 $ 876,106 $ 883,748 $ 854,261 $ 876,569 $ 852,229   $ 3,509,270 $ 3,466,807 $ 3,136,720  
Gross profit on sales 227,459 232,340 240,295 234,907 230,120 219,609 233,758 229,036   935,001 912,523 863,538  
Net income $ 13,245 $ 14,207 $ 19,095 $ 16,191 $ 63,654 [1] $ 4,449 $ 18,475 $ 11,836   $ 62,738 $ 98,414 $ 87,162  
Basic and diluted earnings per share $ 0.49 $ 0.53 $ 0.71 $ 0.60 $ 2.37 $ 0.16 $ 0.69 $ 0.44   $ 2.33 $ 3.66 $ 3.24  
2017 tax reform                   $ 657 $ (49,336)    
Federal tax rate                 21.00%   35.00% 35.00% 35.00%
[1] The quarter ended December 30, 2017 includes the tax benefit of $49.3 million as a result of revaluing the Company's net deferred tax liability using the enacted Federal tax rate of 21% under the Tax Reform.