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Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]                      
Net sales $ 156,264 $ 153,505 $ 153,133 $ 151,778 $ 174,694 $ 200,724 $ 193,896 $ 184,163 $ 614,680 $ 753,477 $ 680,241
Gross profit 51,084 44,156 38,075 42,941 49,857 46,479 33,993 39,874 176,256 170,203 141,804
Operating income 12,515 10,246 6,460 8,046 $ 11,451 $ 6,127 $ (3,926) $ 1,663 37,267 15,315 (1,665)
Net income $ 12,158 $ 6,168 $ 14,400 $ 5,846         $ 38,572 $ 3,630 $ 11,924
Earnings per share:                      
Basic (in dollars per share) $ 0.88 $ 0.44 $ 1.03 $ 0.42 $ 0.50 $ 0.19 $ (0.37) $ (0.07) $ 2.78 $ 0.26 $ 0.85
Diluted (in dollars per share) $ 0.86 $ 0.43 $ 1.02 $ 0.41 $ 0.49 $ 0.19 $ (0.37) $ (0.07) $ 2.72 $ 0.26 $ 0.85