Geographic and Segment Information - Schedule of Operating Segment (Detail) - 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
Segment Reporting Information [Line Items]
Total net sales	$ 174,580	$ 176,697	$ 166,685	$ 161,710	$ 180,462	$ 192,296	$ 167,106	$ 148,105	$ 679,672	$ 687,969	$ 633,712
Total gross profit	$ 49,351	$ 50,310	$ 46,662	$ 41,570	$ 46,089	$ 39,139	$ 36,749	$ 34,249	187,893	156,226	134,864
Operating Segments [Member] | Foundry Services Group [Member]
Segment Reporting Information [Line Items]
Total net sales									320,089	273,961	290,775
Total gross profit									95,458	69,412	66,175
Operating Segments [Member] | Standard Products Group [Member]
Segment Reporting Information [Line Items]
Total net sales									359,375	413,435	342,294
Total gross profit									92,227	87,194	68,094
Operating Segments [Member] | Standard Products Group [Member] | Display Solutions [Member]
Segment Reporting Information [Line Items]
Total net sales									209,539	281,967	207,480
Operating Segments [Member] | Standard Products Group [Member] | Power Solutions [Member]
Segment Reporting Information [Line Items]
Total net sales									149,836	131,468	134,814
All Other [Member]
Segment Reporting Information [Line Items]
Total net sales									208	573	643
Total gross profit									$ 208	$ (380)	$ 595