Assets Held for Sale (Details) $ in Thousands, ¥ in Millions	1 Months Ended					3 Months Ended				9 Months Ended
	Nov. 30, 2016 JPY (¥)	Nov. 30, 2016 USD ($)	Oct. 31, 2016 JPY (¥)	Oct. 31, 2016 USD ($)	Feb. 28, 2016 USD ($)	Sep. 30, 2017 USD ($)	Mar. 31, 2017 JPY (¥)	Mar. 31, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 29, 2016 USD ($)
Long Lived Assets Held-for-sale [Line Items]
Impairment charges						$ 0			$ 7,698	$ 0	$ 7,698
Other current assets, fair value									71,800		71,800	$ 79,500
Gains on asset sales						0			27,945	0	33,187
Revenues						1,152,261			924,676	3,168,207	2,669,342
Net income						$ 79,900			51,450	$ 167,767	65,050
San Jose Land Parcel [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Long Lived Assets Held-for-sale [Line Items]
Gains on asset sales					$ 5,200
London 2 (LD2) [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member]
Long Lived Assets Held-for-sale [Line Items]
Gains on asset sales									$ 27,900
Revenues											6,100
Net income											$ 2,300
Bit-isle [Member] | Solar Power Assets [Member]
Long Lived Assets Held-for-sale [Line Items]
Proceeds from sale of property, plant and equipment	¥ 2,500.0	$ 22,100	¥ 400.0	$ 3,800			¥ 5,313.4	$ 47,800