Revenue and Accounts Receivable, Net - Revenue from External Customers by Geographic Areas (Details) - USD ($) $ 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
Net sales	$ 174,694	$ 200,724	$ 193,896	$ 184,163	$ 170,303	$ 182,717	$ 162,523	$ 164,698	$ 753,477	$ 680,241	$ 695,790
United States
Net sales									407,291	315,214	345,838
Asia (excluding PRC)
Net sales									104,324	124,657	104,668
People’s Republic of China
Net sales									83,677	91,446	83,036
Europe
Net sales									94,491	85,228	79,183
Latin America
Net sales									30,006	30,954	54,113
Other
Net sales									$ 33,688	$ 32,742	$ 28,952