Computation of Net (Loss)/Income Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Dec. 28, 2012	Dec. 30, 2011
Earnings per share - basic
Net income/(loss)	$ 1,077	$ (5,598)
Basic weighted average common shares outstanding	39,497	32,900
Earnings/(loss) per share - basic	$ 0.03	$ (0.17)
Basic weighted average common shares outstanding	39,497	32,900
Effect of dilutive securities:
Convertible senior notes
Dilutive stock awards	546
Dilutive employee stock purchase plan shares	15
Diluted weighted average common shares outstanding	40,058	32,900
Earnings/(loss) per share - diluted	$ 0.03	$ (0.17)

Incremental common shares attributable to employee stock purchase plan.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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