Geographic and Segment Information - Schedule of Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Total net sales	$ 162,015	$ 172,070	$ 326,900	$ 336,234
Total gross profit	35,286	35,457	70,263	75,734
Operating Segments [Member] | Semiconductor Manufacturing Services [Member]
Segment Reporting Information [Line Items]
Total net sales	78,962	90,339	153,482	182,267
Total gross profit	17,183	18,601	32,560	40,723
Operating Segments [Member] | Standard Products Group [Member]
Segment Reporting Information [Line Items]
Total net sales	48,918	45,327	105,271	85,706
Total gross profit	17,963	16,727	37,388	34,801
Operating Segments [Member] | Standard Products Group [Member] | Display Solutions [Member]
Segment Reporting Information [Line Items]
Total net sales	33,995	36,275	67,832	68,050
Operating Segments [Member] | Standard Products Group [Member] | Power Solutions [Member]
Segment Reporting Information [Line Items]
Total net sales	82,913	81,602	173,103	153,756
Other Non Segment [Member]
Segment Reporting Information [Line Items]
Total net sales	140	129	315	211
Total gross profit	$ 140	$ 129	$ 315	$ 210