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Other Assets (Details) (USD $) | Feb. 28, 2013 | Nov. 30, 2012 | Jan. 29, 2013 Convertible senior notes due February 1, 2019 at 1.375%
--- | --- | --- | ---
Other Assets [Abstract] |  |  |  |  |
Cash surrender value of insurance contracts | $ 67,276,000 |  | $ 64,757,000 |  |
Debt issuance costs | 21,159,000 | [1] | 14,563,000 | [1] |
Property and equipment, net | 7,887,000 |  | 7,920,000 |  |
Prepaid expenses | 6,256,000 |  | 7,810,000 |  |
Total | 102,578,000 |  | 95,050,000 |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt Instrument, Face Amount |  |  |  |  | $ 230,000,000
[1] | The increase in debt issuance costs as of February 28, 2013 compared to November 30, 2012 primarily reflected the costs associated with our issuance of the $230 Million Convertible Senior Notes during the three months ended February 28, 2013.

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