Fair Value Measurements (Details 2) (Quoted Prices in Active Markets for Identical Assets (Level 1), USD $) In Thousands, unless otherwise specified	Dec. 02, 2012
Senior notes due 2016
Fair value of long term debt
Long term debt, fair value	$ 294,300
Convertible notes due 2016
Fair value of long term debt
Long term debt, fair value	519,111
Senior subordinated notes due 2014
Fair value of long term debt
Long term debt, fair value	$ 271,312

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant