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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Nov. 30, 2013
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Depreciation and Amortization Expense Computation | Property and equipment are stated at cost. Depreciation and amortization were computed using the straight-line method over our estimates of average useful lives and residual values, as a percentage of original cost, as follows:
| Years |  | Residual Values
Ships | 30 |  | 15%
Ship improvements | Shorter of remaining ship life or useful life (3-28) |  | 0% or 15%
Buildings and improvements | 10-35 |  | 0% or 10%
Computer hardware and software | 2-10 |  | 0% or 10%
Transportation equipment and other | 2-20 |  | 0% or 10%
Leasehold improvements, including port facilities | Shorter of lease term or related asset life (3-30) |  | —

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