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Quarterly Results of Operations (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Oct. 01, 2016
Jul. 02, 2016
Apr. 02, 2016
Dec. 31, 2015
Sep. 26, 2015
Jun. 27, 2015
Mar. 28, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]                      
Total net sales $ 161,848 $ 161,427 $ 167,944 $ 173,109 $ 152,397 $ 120,871 $ 140,872 $ 136,954 $ 664,328 $ 551,094 $ 544,474
Gross profit 53,496 50,251 56,694 59,113 48,244 34,011 48,508 41,397 219,554 172,160 169,174
Net income $ 20,829 $ 19,850 $ 23,515 $ 23,278 $ 17,100 $ 11,963 $ 17,560 $ 15,503 $ 87,472 $ 62,126 $ 38,628
Basic earnings per share $ 1.11 $ 1.05 $ 1.24 $ 1.23 $ 0.91 $ 0.64 $ 0.94 $ 0.83 $ 4.62 $ 3.32 $ 1.99
Diluted earnings per share $ 1.10 $ 1.03 $ 1.22 $ 1.21 $ 0.88 $ 0.62 $ 0.91 $ 0.81 $ 4.59 $ 3.21 $ 1.95