Earnings per Share (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Aug. 26, 2012	Aug. 28, 2011	Aug. 26, 2012	Aug. 28, 2011
Numerator:
Net income attributable to participating securities	$ (1)	$ (4)	$ (12)	$ (7)
Interest on convertible notes		5,239		14,551
Net income from continuing operations available to common shareholders	$ 200	$ 12,724	$ 4,610	$ 22,913
Denominator:
Denominator for basic earnings per share-weighted average shares	103,534	100,334	101,849	98,725
Effect of dilutive securities:
Convertible debt (in shares)		200,455		196,576
Stock options (in shares)	679	747	693	811
Restricted share units	4,977	6,561	6,213	8,117
Other (in shares)	610	469	574	430
Denominator for diluted earnings per share-adjusted weighted average shares and assumed conversions	109,800	308,566	109,329	304,659

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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