Segment Information and Enterprise-Wide Disclosure - Schedule of Net Sales by Countries (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 285,247	$ 250,694	$ 785,774	$ 710,077
Percentage of net sales		100.00%	100.00%	100.00%	100.00%
China
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 156,924	$ 148,567	$ 433,145	$ 411,512
Percentage of net sales		55.00%	59.00%	55.00%	58.00%
United States
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 25,706	$ 21,802	$ 70,361	$ 62,460
Percentage of net sales		9.00%	9.00%	9.00%	9.00%
Korea
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 17,422	$ 15,993	$ 50,785	$ 43,452
Percentage of net sales		6.00%	6.00%	6.00%	6.00%
Germany
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 21,756	$ 14,737	$ 58,210	$ 47,963
Percentage of net sales		8.00%	6.00%	7.00%	7.00%
Singapore
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 17,252	$ 12,497	$ 43,840	$ 35,657
Percentage of net sales		6.00%	5.00%	6.00%	5.00%
Taiwan
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales		$ 15,966	$ 12,424	$ 49,584	$ 44,413
Percentage of net sales		6.00%	5.00%	6.00%	6.00%
All Others
Segment Reporting Revenue Reconciling Item [Line Items]
Net sales	[1]	$ 30,221	$ 24,674	$ 79,849	$ 64,620
Percentage of net sales	[1]	10.00%	10.00%	11.00%	9.00%

[1] Represents countries with less than 3% of the total net sales each.