Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended		9 Months Ended	12 Months Ended
	Dec. 24, 2016	Sep. 24, 2016	Dec. 26, 2015	Sep. 26, 2015	Dec. 24, 2016	Dec. 26, 2015	Mar. 26, 2016	Jun. 25, 2016
Long Lived Assets Held-for-sale [Line Items]
Impairment of long-lived assets	$ 383		$ 1,950		$ 6,517	$ 159,647
Impairment of Long-Lived Assets to be Disposed of				$ 157,697	797	159,647		$ 160,600
Gain (Loss) on Disposition of Property Plant Equipment					(4,550)	5,863
Proceeds from Divestiture of Businesses					42,199	0	$ 105,000
Gain (Loss) on Disposition of Business					$ 26,620	$ 0
MEMS [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Other Property, Plant, and Equipment		$ 42,200
Gain (Loss) on Disposition of Property Plant Equipment		26,600
wafter manufacturing fab [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Other Property, Plant, and Equipment		30,000
Gain (Loss) on Disposition of Property Plant Equipment		1,600
Inventory on hand [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Other Property, Plant, and Equipment		10,000
San Jose Wafer Fab [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from Sale of Other Property, Plant, and Equipment			39,000
Gain (Loss) on Disposition of Property Plant Equipment			$ 3,800
Energy Metering Business [Member]
Long Lived Assets Held-for-sale [Line Items]
Gain (Loss) on Disposition of Business		$ 58,900