Quarterly Financial Information (Unaudited) - Schedule of Unaudited Financial Information by Quarter (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	$ 322,428	$ 370,195	$ 399,016	$ 384,714	$ 385,964	$ 393,954	$ 391,586	$ 406,699	$ 1,476,353	$ 1,578,203	$ 1,328,297
Gross profit	88,987	98,714	104,038	97,969	95,639	109,156	112,773	112,403	389,708	429,971	377,596
Income from operations	32,596	38,386	41,470	34,699	26,672	41,843	82,457	45,333	147,151	196,305	137,871
Income from operations before income tax expense and equity in earnings of affiliated companies	25,533	31,886	33,904	28,256	21,379	35,653	73,680	36,951	119,579	167,663	84,049
Net income	$ 18,965	$ 24,253	$ 24,748	$ 18,954	$ 15,658	$ 25,817	$ 53,081	$ 26,754	$ 86,920	$ 121,310	$ 64,860
Basic EPS (in USD per share)	$ 0.32	$ 0.40	$ 0.41	$ 0.32	$ 0.27	$ 0.43	$ 0.89	$ 0.45	$ 1.45	$ 2.04	$ 1.09
Diluted EPS (in USD per share)	$ 0.31	$ 0.39	$ 0.40	$ 0.32	$ 0.25	$ 0.43	$ 0.87	$ 0.44	$ 1.42	$ 1.99	$ 1.07