Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Information - Summarizes Selected Quarterly Financial Information (Detail)

v3.6.0.2
Selected Quarterly Financial Information - Summarizes Selected Quarterly Financial Information (Detail) - 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
Oct. 03, 2015
Jul. 04, 2015
Apr. 04, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]                      
Sales $ 154,068 $ 155,099 $ 164,426 $ 159,530 $ 157,340 $ 200,145 $ 173,156 $ 161,638 $ 633,123 $ 692,279 $ 661,039
Gross Profit (sales less cost of products sold) 36,486 38,663 44,835 39,483 38,901 59,427 49,452 40,162 159,467 187,942 167,042
Income Before Income Taxes 14,296 16,422 21,555 16,512 14,822 35,887 27,044 16,297      
Net income $ 9,885 $ 12,074 $ 14,980 $ 11,485 $ 13,907 $ 24,694 $ 17,690 $ 10,683 $ 48,424 $ 66,974 $ 56,170
Basic Earnings Per Share (in usd per share) $ 0.34 $ 0.42 $ 0.51 $ 0.39 $ 0.47 $ 0.84 $ 0.61 $ 0.37 $ 1.66 $ 2.29 $ 1.96
Diluted Earnings Per Share (in usd per share) $ 0.33 $ 0.41 $ 0.50 $ 0.38 $ 0.46 $ 0.82 $ 0.59 $ 0.35 $ 1.61 $ 2.22 $ 1.87