Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Information (unaudited) (Details)

v3.8.0.1
Selected Quarterly Financial Information (unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 28, 2017
Sep. 28, 2017
Jun. 29, 2017
Mar. 30, 2017
Dec. 29, 2016
Sep. 29, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 28, 2017
Dec. 29, 2016
Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 389,501 $ 343,923 $ 344,047 $ 307,296 $ 278,294 $ 271,311 $ 265,853 $ 235,301 $ 1,384,767 $ 1,050,759 $ 784,012
Gross Profit 162,374 142,491 142,228 125,471 114,746 110,967 109,652 93,897 572,564 429,262 312,622
Net income $ 47,976 $ 23,255 $ 20,429 $ 11,128 $ 16,707 $ 14,219 $ 5,012 $ 7,101 $ 102,788 $ 43,039 $ 26,807
Basic earnings per share $ 0.51 $ 0.25 $ 0.22 $ 0.13 $ 0.20 $ 0.17 $ 0.06 $ 0.09 $ 1.13 $ 0.52 $ 0.32
Diluted earnings per share $ 0.46 $ 0.22 $ 0.20 $ 0.13 $ 0.19 $ 0.16 $ 0.06 $ 0.08 $ 1.03 $ 0.49 $ 0.31