Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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Face (par) amount of debt instrument at time of issuance.

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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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The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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The amount of debt discount (net of debt premium) that was originally recognized at the issuance of the instrument that has yet to be amortized.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Debt Components of the Convertible Notes (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
	Sep. 15, 2015	Apr. 23, 2016	Apr. 23, 2016	Apr. 25, 2015
Debt Instrument [Line Items]
Payments of Debt Issuance Costs			$ 15,542	$ 3,527
Amortization of debt discount			10,119	$ 0
0.75% Convertible Notes Liability Component [Member]
Debt Instrument [Line Items]
Debt Issuance Cost	$ (10,100)
Payments of Debt Issuance Costs	1,300
Amortization of debt discount		$ 300	800
0.75% Convertible Notes Equity Component [Member]
Debt Instrument [Line Items]
Debt Issuance Cost	(3,600)
0.75% Convertible Senior Notes Due 2021
Debt Instrument [Line Items]
Debt Instrument, Face Amount	485,000	485,000	485,000
Debt Instrument, Unamortized Discount		(106,269)	(106,269)
Debt Issuance Cost	(15,100)	(9,404)	(9,404)
Net carrying amount of Notes		369,327	369,327
Equity component of 0.75% senior convertible notes due 2021, net		112,554	112,554
Debt Instrument, Unamortized Discount (Premium), Net	13,300
Payments of Debt Issuance Costs	$ 1,800
Amortization of debt discount		$ 4,200	$ 10,100