Geographic and Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Schedule of Operating Segments

The following sets forth information relating to the operating segments (in thousands):

	Year Ended December 31,
	2017		2016		2015
Net Sales
Foundry Services Group	$	320,089	$	273,961	$	290,775
Standard Products Group
Display Solutions		209,539		281,967		207,480
Power Solutions		149,836		131,468		134,814
Total Standard Products Group		359,375		413,435		342,294
All other		208		573		643
Total net sales	$	679,672	$	687,969	$	633,712

	Year Ended December 31,
	2017		2016			2015
Gross Profit
Foundry Services Group	$	95,458	$	69,412		$	66,175
Standard Products Group		92,227		87,194			68,094
All other		208		(380	)		595
Total gross profit	$	187,893	$	156,226		$	134,864

Net Sales by Region, Based on Location of Products are Billed

The following is a summary of net sales by geographic region, based on the location to which the products are billed (in thousands):

	Year Ended December 31,
	2017		2016		2015
Korea	$	279,883	$	219,618	$	241,715
Asia Pacific (other than Korea)		322,595		391,875		316,562
U.S.A.		35,089		33,201		51,164
Europe		41,109		42,274		23,461
Others		996		1,001		810
Total	$	679,672	$	687,969	$	633,712