Note 11 Stock Options Outstanding Rollforward (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended	12 Months Ended
Mar. 28, 2015	Sep. 27, 2014
Options Outstanding [Roll Forward]
Outstanding, beginning	8,181
Granted	486
Exercised/Cancelled/Forfeited/Expired	(1,405)
Outstanding, ending	7,262	8,181
Vested and Expected to Vest	7,124
Exercisable	5,793
Weighted Average Exercise Price [Abstract]
Outstanding, beginning	$ 12.90
Granted	$ 24.65
Exercised/Cancelled/Forfeited/Expired	$ 17.06
Outstanding, ending	$ 12.88	$ 12.90
Vested and expected to vest	$ 12.81
Exercisable	$ 12.30
Weighted Average Remaining Contractual Term (Years) [Abstract]
Outstanding	5 years 4 months 15 days	5 years 3 months 20 days
Vested and Expected to Vest	5 years 3 months 22 days
Exercisable	4 years 7 months 17 days
Aggregate Intrinsic Value of In the Money Options [Abstract]
Outstanding	$ 80,694	$ 93,767
Vested and Expected to Vest	79,654
Exercisable	$ 67,543
Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value	$ 12.75

Number of stock options exercised, cancelled, forfeited or expired during the period.

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Weighted average exercise price of stock options exercised, cancelled, forfeited or expired during the period.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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