Related Party Transactions - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended	12 Months Ended
Jun. 28, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012	Sep. 28, 2012 Installment
Related Party Transaction [Line Items]
Ownership interest in dpiX Holding LLC	40.00%		40.00%
dpiX Holding LLC's ownership interest in dpiX LLC	100.00%		100.00%
Income (Loss) on equity investment in affiliate	$ 3,000,000	$ 1,700,000	$ 2,459,000	$ 1,225,000
Carrying value of the equity investment in dpiX Holding	49,700,000		49,700,000		45,500,000
Loan agreement, related party					8,800,000
Loan agreement, amendment date					December 2011
Related party loan agreement, interest rate					Prime plus 1%
Number of installment payment for principal with accrued interest					2
Purchases of glass transistor arrays from dpiX	$ 6,500,000	$ 2,900,000	$ 22,600,000	$ 10,900,000

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amendment date

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Loan agreement related party amount repaid.

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Number of Installments

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Percentage of subsidiary ownership.

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- Definition

The stated interest rate per the agreement.

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