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Investments (Policies)
9 Months Ended
Sep. 30, 2011
Investments [Abstract] 
Land Held-for-sale [Policy Text Block]
Land held-for-sale is recorded at the lower of cost or fair value as determined by the evaluation of individual land parcels.
Long-Term Finance Receivables [Policy Text Block]
Long-term finance receivables are collateralized by property sold, accrue interest at market-based rates and are net of an allowance for doubtful accounts.