Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The strike price on the price risk option contract such as a put option or a call option.

+ References

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The cash outflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3581-108585

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- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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Convertible Senior Notes, Warrants and Hedges (Hedge and Warrant Transactions) (Details) $ / shares in Units, $ in Thousands			9 Months Ended
	Nov. 03, 2015 USD ($) $ / option	Oct. 29, 2015 USD ($)	Jan. 01, 2017 USD ($) $ / shares	Jan. 03, 2016 USD ($)
Derivative [Line Items]
Proceeds from issuance of warrants			$ 0	$ 56,847
JPMorgan Chase Bank, National Association \| Initial Bond Hedge
Derivative [Line Items]
Payments for hedge		$ 81,900	94,200
Bond hedge strike price (in dollars per share) \| $ / option	33.45
JPMorgan Chase Bank, National Association \| Initial Warrant Transaction
Derivative [Line Items]
Proceeds from issuance of warrants	$ 7,400	$ 49,400	$ 56,800
Initial strike price of warrants (in dollars per share) \| $ / shares			$ 48.66
JPMorgan Chase Bank, National Association \| Additional Bond Hedge
Derivative [Line Items]
Payments for hedge	$ 12,300