Summary of Significant Accounting Policies - Schedule of the Effects of the Accounting Classification Change (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales	$ 239,722	$ 184,419	$ 200,964	$ 194,491	$ 229,302	$ 176,867	$ 269,171	$ 140,575	$ 819,596	$ 815,915	$ 568,800
Cost of sales	149,832	136,983	144,610	136,828	162,590	116,922	138,480	108,447	568,253	526,439	441,718
Other operating (income) expense, net									(4,393)	(9,086)	3,548
Prior to Reclassification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales	233,482	177,946	194,719	186,512	220,464	171,421	261,550	134,843	792,659	788,278	544,874
Cost of sales	$ 149,206	$ 136,583	$ 143,687	$ 136,413	$ 161,918	$ 116,624	$ 138,194	$ 107,971	565,889	524,707	441,099
Other operating (income) expense, net									(28,966)	(34,991)	(19,759)
Change in Accounting Classification
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales									26,937	27,637	23,926
Cost of sales									2,364	1,732	619
Other operating (income) expense, net									$ 24,573	$ 25,905	$ 23,307