Restructuring Impairments and Other Costs - Additional Information (Detail) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 26, 2016	Mar. 27, 2016	Sep. 27, 2015	Jun. 28, 2015	Jun. 26, 2016	Jun. 28, 2015	Dec. 25, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring, impairment and other costs, net of releases and gains	$ 600,000			$ 4,200,000	$ (10,300,000)	$ 8,900,000
Description of restructuring activity					We eliminated our internal 5-inch and significantly reduced 6-inch wafer fabrication lines and rationalized our assembly and test capacity, resulting in the closure of our manufacturing and assembly facilities in West Jordan, Utah and Penang, Malaysia, as well as the remaining 5-inch wafer fabrication lines in Bucheon, South Korea. We ended production at these sites during the third quarter of fiscal year 2015.
2015 Operating Expense Reduction Program
Restructuring Cost and Reserve [Line Items]
Restructuring And Related Activities Expected Completion Year			Jun. 26, 2016
2015 Operating Expense Reduction Program | Minimum
Restructuring Cost and Reserve [Line Items]
Reduction in operating expenses			$ (30,000,000)
2015 Operating Expense Reduction Program | Maximum
Restructuring Cost and Reserve [Line Items]
Reduction in operating expenses			(34,000,000)
2014 Infrastructure Realignment Program | Malaysia
Restructuring Cost and Reserve [Line Items]
Gain on disposal of asset		$ 12,300,000
Employee Separation Costs | 2015 Operating Expense Reduction Program
Restructuring Cost and Reserve [Line Items]
Restructuring charges			$ 12,900,000
Factory Closure Costs | Scenario, Forecast
Restructuring Cost and Reserve [Line Items]
Expected additional costs							$ 1,000,000