Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 76,400	$ 88,863	$ 67,437	$ 66,555	$ 92,586	$ 86,959	$ 95,417	$ 84,149	$ 299,255	$ 359,111	$ 321,139
Gross profit	63,691	75,658	57,688	59,137	82,183	79,604	86,147	74,791	256,174	322,725	285,920
Income tax provision benefit (expense)	(220)	309	(42)	(42)	(27,497)	(650)	13	1,552	5	(26,582)	19,639
Net income (loss)	$ (7,476)	$ 12,379	$ (17,210)	$ (13,273)	$ (36,224)	$ (178)	$ 1,804	$ 4,619	$ (25,580)	$ (29,979)	$ 64,727
Net income (loss) per common share - basic (in dollars per share)	$ (0.07)	$ 0.12	$ (0.16)	$ (0.12)	$ (0.34)	$ 0.00	$ 0.02	$ 0.04	$ (0.24)	$ (0.28)	$ 0.61
Net income (loss) per common share - diluted (in dollars per share)	$ (0.07)	$ 0.11	$ (0.16)	$ (0.12)	$ (0.34)	$ 0.00	$ 0.02	$ 0.04	$ (0.24)	$ (0.28)	$ 0.56